<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.2 20190208//EN" "http://jats.nlm.nih.gov/publishing/1.2/JATS-journalpublishing1.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="research-article" dtd-version="1.2" xml:lang="en">
    <front>
        <journal-meta>
            <journal-id journal-id-type="pmc">StoMiedIntRelat</journal-id>
            <journal-title-group>
                <journal-title>Stosunki Mi&#x0119;dzynarodowe &#x2013; International Relations</journal-title>
            </journal-title-group>
            <issn pub-type="epub">2754-2572</issn>
            <publisher>
                <publisher-name>F1000 Research Limited</publisher-name>
                <publisher-loc>London, UK</publisher-loc>
            </publisher>
        </journal-meta>
        <article-meta>
            <article-id pub-id-type="doi">10.12688/stomiedintrelat.17927.2</article-id>
            <article-categories>
                <subj-group subj-group-type="heading">
                    <subject>Research Article</subject>
                </subj-group>
                <subj-group>
                    <subject>Articles</subject>
                </subj-group>
            </article-categories>
            <title-group>
                <article-title>The Taiwan Game. Navigating U.S.-China Tensions from Game Theory Perspective</article-title>
                <fn-group content-type="pub-status">
                    <fn>
                        <p>[version 2; peer review: 2 approved, 1 approved with reservations]</p>
                    </fn>
                </fn-group>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author" corresp="yes">
                    <name>
                        <surname>Zi&#x0119;tek</surname>
                        <given-names>Agata</given-names>
                    </name>
                    <role content-type="http://credit.niso.org/">Conceptualization</role>
                    <role content-type="http://credit.niso.org/">Formal Analysis</role>
                    <role content-type="http://credit.niso.org/">Investigation</role>
                    <role content-type="http://credit.niso.org/">Methodology</role>
                    <role content-type="http://credit.niso.org/">Project Administration</role>
                    <role content-type="http://credit.niso.org/">Resources</role>
                    <role content-type="http://credit.niso.org/">Writing &#x2013; Original Draft Preparation</role>
                    <role content-type="http://credit.niso.org/">Writing &#x2013; Review &amp; Editing</role>
                    <uri content-type="orcid">https://orcid.org/0000-0003-2534-3950</uri>
                    <xref ref-type="corresp" rid="c1">a</xref>
                    <xref ref-type="aff" rid="a1">1</xref>
                </contrib>
                <contrib contrib-type="author" corresp="no">
                    <name>
                        <surname>Larus</surname>
                        <given-names>Elizabeth Freund</given-names>
                    </name>
                    <role content-type="http://credit.niso.org/">Conceptualization</role>
                    <role content-type="http://credit.niso.org/">Formal Analysis</role>
                    <role content-type="http://credit.niso.org/">Investigation</role>
                    <role content-type="http://credit.niso.org/">Methodology</role>
                    <role content-type="http://credit.niso.org/">Resources</role>
                    <role content-type="http://credit.niso.org/">Writing &#x2013; Original Draft Preparation</role>
                    <role content-type="http://credit.niso.org/">Writing &#x2013; Review &amp; Editing</role>
                    <xref ref-type="aff" rid="a2">2</xref>
                </contrib>
                <contrib contrib-type="author" corresp="no">
                    <name>
                        <surname>Tatarczak</surname>
                        <given-names>Anna</given-names>
                    </name>
                    <role content-type="http://credit.niso.org/">Formal Analysis</role>
                    <role content-type="http://credit.niso.org/">Methodology</role>
                    <role content-type="http://credit.niso.org/">Writing &#x2013; Original Draft Preparation</role>
                    <xref ref-type="aff" rid="a3">3</xref>
                </contrib>
                <aff id="a1">
                    <label>1</label>Institute of International Relations, Maria Curie Sklodowska University, Lublin, 20-612, Poland</aff>
                <aff id="a2">
                    <label>2</label>University of Mary Washington, Fredericksburg, Virginia, USA</aff>
                <aff id="a3">
                    <label>3</label>Faculty of Economics, Maria Curie Sk&#x0142;odowska University, Lublin, 20-031, Poland</aff>
            </contrib-group>
            <author-notes>
                <corresp id="c1">
                    <label>a</label>
                    <email xlink:href="mailto:wiktoriazietek@gmail.com">wiktoriazietek@gmail.com</email>
                </corresp>
                <fn fn-type="conflict">
                    <p>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>7</day>
                <month>8</month>
                <year>2025</year>
            </pub-date>
            <pub-date pub-type="collection">
                <year>2025</year>
            </pub-date>
            <volume>5</volume>
            <elocation-id>14</elocation-id>
            <history>
                <date date-type="accepted">
                    <day>31</day>
                    <month>7</month>
                    <year>2025</year>
                </date>
            </history>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Zi&#x0119;tek A et al.</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <self-uri content-type="pdf" xlink:href="https://internationalrelations-publishing.org/articles/5-14/pdf"/>
            <abstract>
                <p>Taiwan is a potential flashpoint for conflict between the U.S. and China. Although it has been de facto independent of China for more than seventy years, China&#x2019;s leaders regard Taiwan as an inseparable part of the PRC. While China claims to strive for peaceful &#x201c;reunification,&#x201d; it has never renounced the use of force against Taiwan. Despite a 45-year policy of &#x201c;strategic ambiguity&#x201d; regarding Taiwan&#x2019;s defense, the U.S. has declared its support for the use of military force to defend Taiwan. China&#x2019;s threats and U.S. support have created a security dilemma, in which adversaries build up their respective offensive or defensive capabilities in response to each other&#x2019;s actions. This article employs game theory to assess whether the United States and China are more likely to use force or seek accommodation in determining Taiwan&#x2019;s future. The paper seeks to answer the following questions: What risks would China&#x2019;s leaders be willing to take to secure the benefits of seizing Taiwan? What costs would they be willing to bear? Is the United States prepared to use military force to defend Taiwan? To demonstrate the usefulness of game theory, the paper begins with an explanation of the history of classical game theory. It then provides an overview of cross-strait relations and the role of the United States as Taiwan&#x2019;s security guarantor. The payoff structure of this analysis reflects the dynamics of a Chicken Game with asymmetric stakes: China&#x2019;s pursuit of peaceful unification represents a strategic imperative tied to national identity, while the United States prioritizes regional stability and ally credibility. These differing levels of urgency and risk tolerance shape their strategic decisions.</p>
            </abstract>
            <kwd-group kwd-group-type="author">
                <kwd>Game Theory</kwd>
                <kwd>China</kwd>
                <kwd>United States</kwd>
                <kwd>Taiwan</kwd>
                <kwd>Taiwan Strait</kwd>
                <kwd>Security Dilemma</kwd>
            </kwd-group>
            <funding-group>
                <funding-statement>The author(s) declared that no grants were involved in supporting this work.</funding-statement>
            </funding-group>
        </article-meta>
        <notes>
            <sec sec-type="version-changes">
                <label>Revised</label>
                <title>Amendments from Version 1</title>
                <p>We are grateful for the reviewer&#x2019;s thoughtful and constructive feedback, which has helped us significantly improve the clarity and rigor of the article. We have added an explicit explanation that our analysis is rooted in non-cooperative game theory. The Chicken Game was chosen because it best reflects the asymmetry of interests and the high-stakes brinkmanship between the United States and China. While other models, such as repeated or sequential games, could offer valuable insights, the chosen framework provides analytical clarity within the limits of article length.We acknowledge that excluding Taiwan as an independent player may appear limiting. However, our primary aim was to model U.S.&#x2013;China dynamics, with Taiwan treated as the central stake rather than a third actor. In response to the reviewer&#x2019;s concern, Table 1 has been revised to include more nuanced outcomes.The conclusion now addresses the limitations of game theory and considers how leadership turnover, alliance dynamics, and shifting priorities may alter outcomes. All inaccuracies and outdated references have been corrected. We thank the reviewer for these valuable insights.</p>
            </sec>
        </notes>
    </front>
    <body>
        <sec sec-type="intro">
            <title>Introduction</title>
            <p>In May 2021, 
                <italic toggle="yes">The Economist</italic> featured Taiwan on its cover, labeling it &#x201c;the most dangerous place on Earth&#x201d;&#x2014;a claim that initially drew criticism for perceived exaggeration. However, subsequent developments have validated such concerns, as cross-Strait tensions have reached their highest levels in nearly three decades. Taiwan is now widely regarded as a volatile geopolitical flashpoint with far-reaching regional and global implications. The World Economic Forum&#x2019;s 2022 
                <italic toggle="yes">Global Risk Report</italic> designated Taiwan as a high-risk area, citing the intensification of the People&#x2019;s Republic of China&#x2019;s activities near its borders. In 2023, Taiwan and China were jointly identified as one of the top five global hotspots for potential interstate conflict, particularly in the East and Southeast Asian context. The 2024 edition of the 
                <italic toggle="yes">Global Risk Report</italic> further underscored this trajectory by listing Taiwan&#x2014;alongside the conflicts in Ukraine and Gaza&#x2014;as one of the world&#x2019;s most pressing geopolitical flashpoints. As a result, Taiwan has come to symbolize broader concerns over regional security and the potential for great-power confrontation.
                <sup>
                    <xref ref-type="other" rid="FN1">1</xref>
                </sup>
            </p>
            <p>For over seventy years, Taiwan has experienced dynamic social, economic, and political change while striving to maintain an uneven balance with its western neighbour, the People's Republic of China (PRC, hereafter "China"). Today, China regards this thriving democracy of approximately 24 million people as a breakaway province that must be reunified with the mainland as soon as possible.</p>
            <p>Taiwan is a potential flashpoint for conflict between the U.S. and China. Although it has been de facto independent of China for more than seventy years, China&#x2019;s leaders regard Taiwan as an inseparable part of the People&#x2019;s Republic of China. Like his predecessors, Xi has pledged to seek peaceful reunification but has not renounced the use of force to unite Taiwan with China. More recently, China&#x2019;s leader Xi Jinping pledged to take &#x201c;all measures necessary&#x201d; to unite Taiwan with the PRC. The official U.S. stance is that Taiwan&#x2019;s future should be determined peacefully by the people on both sides of the Taiwan Strait. The Biden administration has expressed support for using U.S. military force to defend Taiwan if necessary. These positions were often nuanced or later &#x201c;reformulated&#x201d; by administration officials. The United States has long pursued a policy of strategic ambiguity. Statements by Donald Trump and the recent shift in tone raise further questions. As recently as 2021, Donald Trump enjoyed significant popularity in Taiwan, partly because he was credited with bringing the U.S. and Taiwan closer. As the 47th President of the U.S., after a series of comments, it is no longer clear whether Taiwan can count on continued support during his potential second term. His stance on strategic ambiguity seems to reflect an application of the &#x201c;madman theory
                <sup>
                    <xref ref-type="other" rid="FN2">2</xref>
                </sup>,&#x201d; especially in the context of U.S.-China relations. However, Xi maintains that Taiwan&#x2019;s reunification with China is an internal matter that should be resolved without external interference. China&#x2019;s threats to forcibly unite Taiwan and possible U.S. support for Taiwan distinctive of China are contradictory. Their opposing positions have created a security dilemma, in which adversaries build up their respective offensive or defensive capabilities in response to actions taken by the other. This spiraling can compel Beijing and Washington to either seek accommodation in their differences or use military force in pursuit of their aspirations
                <sup>
                    <xref ref-type="other" rid="FN3">3</xref>
                </sup>.</p>
            <p>This article applies game theory to assess whether the United States and China are more inclined to pursue military confrontation or diplomatic accommodation in determining the future of Taiwan. By offering a structured analytical framework, game theory enables a deeper understanding of the strategic interactions and decision-making processes that define high-stakes geopolitical conflicts. In particular, it provides insights into how such conflicts&#x2014;like the one potentially unfolding in the Taiwan Strait&#x2014;might be managed or averted. The paper addresses several key questions: What level of risk are Chinese leaders prepared to assume to achieve the strategic gains associated with the seizure of Taiwan? What costs&#x2014;political, economic, and military&#x2014;are they likely willing to incur? Finally, to what extent is the United States prepared to employ military force in defense of Taiwan?</p>
            <p>To demonstrate the usefulness of game theory, the paper begins with an explanation of the history of classical game theory. It then familiarizes the reader with an overview of relations across the Taiwan Strait and role of the United States as Taiwan&#x2019;s security guarantor. The next section of the paper applies game theory, assessing likely scenarios and outcomes, to determine whether the United States and China are more likely to accommodate each other&#x2019;s position on the status of Taiwan or to use force to resolve their differences.</p>
            <p>Game theory is a research method, a theory of effective action and a theory of effective conflict resolution. Game theory is a branch of mathematics that analyzes the structure and resolution of conflicts.
                <sup>
                    <xref ref-type="other" rid="FN4">4</xref>
                </sup> A defining characteristic of decision-making in game theory is that a player's outcome depends not only on their own choices and random factors but also on the decisions of one or more other players. Players&#x2019; interests can be completely aligned, entirely opposed, or, more commonly, a mix of both. While each player&#x2019;s possible outcomes are well-defined, they remain uncertain due to the unpredictability of others&#x2019; choices and external factors.</p>
            <p>Although game theory can address scenarios where players' interests align, its most intriguing applications lie in situations involving conflict.
                <sup>
                    <xref ref-type="other" rid="FN5">5</xref>
                </sup> Originally introduced by J. von Neumann and O. Morgenstern, game theory was founded on several key assumptions about the logical reasoning of players, both individually and collectively. No one individual is able to control the results. This theory involves making recommendations for rational and effective action, assuming that the other participant is also rational.
                <sup>
                    <xref ref-type="other" rid="FN6">6</xref>
                </sup> Game theory provides a formal language to describe a conflict or decision challenge, and a set of tools to analyze or resolve it. The states under study are called players, their actions are strategies, and their payoffs are outcomes depending on the chosen strategies.</p>
            <p>Game theory, according to Polish researcher Z. J. Pietras should be understood as a set of mathematical models for solving situations in which the conflicting interests of decision-making centers intertwine. It assumes that the goal is not to eliminate the other party, which has its own hierarchies of preferences. Knowing the hierarchies of the other party's preferences allows participants to anticipate the results and thereby act rationally, i.e., seek to maximize the expected payoff. In other words, players seek to maximize the realization of their goals.
                <sup>
                    <xref ref-type="other" rid="FN7">7</xref>
                </sup> Participants are assumed to have a choice between two basic strategies: cooperative (peaceful, altruistic) and confrontational (warlike, competitive, non-cooperative, egoistic, and betrayal). To formalize a conflict as a game, one needs to identify the players, their respective strategies, and the payoffs to each player for each outcome. The payoff for a player is expressed using utility function, which represents the preferences of a player over possible outcomes. Formally, the utility function can be written as 
                <italic toggle="yes">U
                    <sub>i</sub>
                </italic>(
                <italic toggle="yes">s
                    <sub>1</sub>,s
                    <sub>2</sub>,&#x2026;,s
                    <sub>n</sub>
                </italic>), where 
                <italic toggle="yes">U
                    <sub>i</sub>
                </italic> denotes the utility (or payoff) for player 
                <italic toggle="yes">i</italic>, and 
                <italic toggle="yes">s
                    <sub>1</sub>, s
                    <sub>2</sub>,&#x2026;, s
                    <sub>n</sub>
                </italic> are the strategies chosen by all 
                <italic toggle="yes">n</italic> players in the game. The utility function encapsulates how much value a player derives from a specific combination of strategies. In this context, the payoff for a specific player, such as the United States or China in the Taiwan Strait conflict, is denoted as 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>) or 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>), where 
                <italic toggle="yes">i</italic> and 
                <italic toggle="yes">j</italic> correspond to the strategies chosen by the United States and China, respectively.</p>
            <p>We find that game theory is particularly useful in addressing existing and emerging challenges in the Indo-Pacific region. One of the most pressing current challenges are tensions between Taiwan and China and those between China and the United States. Our primary goal in this article was to model the bilateral strategic tensions between the United States and the People&#x2019;s Republic of China, as perceived through the lens of game theory. In this context, Taiwan is treated as the central stake over which both actors compete&#x2014;rather than as a third player within the game-theoretic structure. Before turning to game theory in relation to the analysis of US-China relations in the context of the Taiwan Strait, we will outline the background and sources of recent tensions.</p>
        </sec>
        <sec>
            <title>Relations across the Taiwan Strait</title>
            <p>Strained relations between the People&#x2019;s Republic of China (PRC) and the Republic of China (ROC) on Taiwan have been a potential source of conflict for decades. Cross-Strait tensions developed in the late 1940s when the Kuomintang (KMT), having been defeated by the Chinese Communist Party (CCP), retreated to Taiwan near the end of the Chinese Civil War. Two distinct political entities evolved following the ROC&#x2019;s retreat to Taiwan. For many years, both the PRC and the ROC claimed a single state on the Chinese mainland (大陸) but disagreed if jurisdiction of the mainland belonged to the ROC founded in 1912 or the PRC founded in 1949. During a process of Reform and Opening in the PRC as well as democratization in the ROC, semi-official representatives of the KMT and CCP met in 1992, concluding with a consensus that both Taiwan and the Chinese mainland belonged to &#x201c;one China&#x201d; but with each side maintaining &#x201c;respective interpretations&#x201d; (一中各表) of one China. In the succeeding decades of democratization (minzhuhua 民主化) and nativization (本土化 
                <italic toggle="yes">bentuhua</italic>), Taiwan has increasingly sought to define its own national identity and international status distinctive from that of China&#x2019;s. Although the goal for the KMT has long been eventual unification with mainland China under a democratic policy, democratization in Taiwan but not in China has made unification less attractive. Cross-Strait relations deteriorated in 1999 when Lee Teng-hui articulated his &#x201c;Two States Theory,&#x201d; which defined relations between Taiwan and China as &#x201c;between two countries.&#x201d;
                <sup>
                    <xref ref-type="other" rid="FN8">8</xref>
                </sup> Cross-Strait relations further deteriorated after the 2000 election of Chen Shui-bian (2000&#x2013;2008), who touted &#x201c;Two Different Countries separated by the Taiwan Strait.&#x201d; ROC President Ma Ying-jeou (2008&#x2013;2016), returned to the spirit of the so-called 1992 Consensus (九二共識), believing that cooperation with China was the best route to Taiwan&#x2019;s security.
                <sup>
                    <xref ref-type="other" rid="FN9">9</xref>
                </sup> Official dialogue between China and Taiwan was suspended, however, after Tsai Ing-wen&#x2019;s 2016 election as ROC president. Tsai refused to support the 1992 Consensus, which she associated with the &#x201c;one country, two systems&#x201d; formula applied to Hong Kong after 1997, and insisted that Beijing treat Taiwan as an equal as a precondition for talks. In her 2016 inaugural address, Tsai Ing-wen, the first female president of Taiwan, emphasized her commitment to upholding Taiwan's sovereignty and territorial integrity. By referencing the Constitution of the Republic of China (ROC), she reaffirmed Taiwan's political identity and legal framework, signaling her intention to defend its status against external pressures. This was especially significant because Tsai&#x2019;s inauguration came at a time of heightened tension between Taiwan and China. Beijing regards Taiwan as part of its territory and has repeatedly sought to pressure Taiwan to accept reunification under Chinese rule. Tsai, as a member of the Democratic Progressive Party (DPP), has been critical of China&#x2019;s approach, advocating for Taiwan's distinct political and cultural identity. In this context, Tsai&#x2019;s words served as a reaffirmation of Taiwan's self-governance and her position on safeguarding its sovereignty, signaling to both domestic and international audiences that her administration would resist any attempts at coercive reunification.
                <sup>
                    <xref ref-type="other" rid="FN10">10</xref>
                </sup> Beijing rejected this formulation. For the CCP, Taiwan is a &#x2018;core interest&#x2019; and unification is essential to China&#x2019;s survival and development. In response, Beijing cut off contacts with Taiwan and escalated its use of &#x2018;gray zone&#x2019; tactics, including cyber-attacks, selective trade embargos, military incursions into Taiwan airspace, naval exercises in the water around the island, to intimidate Taiwan.</p>
            <p>In his 2024 presidential election victory speech, Taiwan&#x2019;s newly elected president, Lai Ching-te, emphasized his commitment to maintaining the cross-strait status quo and called for reopening dialogue with China to replace confrontation. While Lai reaffirmed his intention to preserve Taiwan's current political situation, he did not explicitly pledge to conduct cross-strait relations according to the Constitution of the Republic of China (ROC), which upholds the one-China framework. This omission suggests that Lai aims to approach Taiwan's relationship with China without directly endorsing Beijing&#x2019;s claim over the island. In addition, Lai thanked the United States and Taiwan&#x2019;s international allies for their support, particularly appreciating the 2024 Indo-Pacific Security Supplemental Appropriations Act passed by the U.S. This legislation will provide increased security and assistance to the Indo-Pacific region, contributing to the stability of the Taiwan Strait. Lai's acknowledgment highlights Taiwan's close ties with the U.S. and its role in ensuring the region&#x2019;s peace amidst ongoing tensions with China.
                <sup>
                    <xref ref-type="other" rid="FN11">11</xref>
                </sup> In his May 20, 2024 inauguration speech, Lai Ching-te emphasized Taiwan&#x2019;s sovereignty, stating clearly that the Republic of China (ROC) and the People&#x2019;s Republic of China (PRC) are not subordinate to one another. He pointed to the first chapter of Taiwan's Constitution, which asserts that "The sovereignty of the Republic of China shall reside in the whole body of citizens," and that "Persons possessing the nationality of the Republic of China shall be citizens of the Republic of China." These constitutional provisions, Lai argued, underscore Taiwan's independent sovereignty and identity. Furthermore, Lai called for unity among the people of Taiwan, urging them to come together to safeguard the Taiwanese nation. He emphasized that all political parties should oppose annexation and protect Taiwan's sovereignty, stressing that no one should consider sacrificing the nation&#x2019;s sovereignty for political gain or power. His speech reinforced Taiwan's determination to maintain its independence and to reject any attempts at reunification under Chinese rule.
                <sup>
                    <xref ref-type="other" rid="FN12">12</xref>
                </sup> President Lai also called for dialogue with Beijing and demonstrated an openness to resuming cross-strait tourism and student exchanges. President Lai has emphasized a distinct Taiwanese identity and advanced policies that lean toward independence, positions that Beijing considers ideologically provocative. In response, China&#x2019;s state-run media accused Lai of delivering a speech containing &#x201c;deceitful political lies,&#x201d; claiming that he was &#x201c;promoting the separatist ideology of &#x2018;Taiwan independence,&#x2019; inciting cross-Strait antagonism, and advocating independence through reliance on foreign support and military means.&#x201d;
                <sup>
                    <xref ref-type="other" rid="FN13">13</xref>
                </sup>
            </p>
        </sec>
        <sec>
            <title>The US as security guarantor</title>
            <p>The United States plays a crucial role as Taiwan's most significant security guarantor, with U.S.-China relations being a key factor in maintaining Taiwan's security. While China's "One China Principle" asserts that Taiwan is part of the People's Republic of China (PRC), the U.S. "One China Policy" does not take a definitive stance on whether &#x201c;China&#x201d; refers to the PRC or the Republic of China (ROC). The U.S. acknowledges that there is only one China but refrains from specifying which entity it recognizes as the representative government. Although the U.S. switched its formal diplomatic recognition from the ROC to the PRC in 1979, it continues to maintain unofficial relations with Taiwan through the Taiwan Relations Act (TRA). This act, enacted in the same year, legally commits the United States to provide military arms to Taiwan for self-defense purposes, ensuring Taiwan's security in the face of potential threats. In 1982, the U.S. further bolstered its support for Taiwan with the "Six Assurances". These assurances include a commitment to not set a deadline for ending arms sales to Taiwan, not altering the terms of the TRA, and not consulting with China in advance about arms sales decisions. The assurances make it clear that any reduction in U.S. arms sales to Taiwan is contingent upon the PRC&#x2019;s commitment to a peaceful resolution of cross-strait issues, ensuring that Taiwan&#x2019;s defense is not compromised by political pressure from Beijing.
                <sup>
                    <xref ref-type="other" rid="FN14">14</xref>
                </sup> Conversely, if the PRC adopts a hostile stance towards Taiwan, the United States would likely increase arms sales to Taiwan as a means of strengthening its self-defense capabilities.
                <sup>
                    <xref ref-type="other" rid="FN15">15</xref>
                </sup>
            </p>
            <p>A central element of Taiwan's security strategy is the U.S. policy of strategic ambiguity
                <sup>
                    <xref ref-type="other" rid="FN16">16</xref>
                </sup>. This approach aims to create a mutual deterrence by keeping the U.S. stance on a cross-Strait conflict deliberately unclear. It leaves Beijing uncertain about whether the U.S. would intervene to defend Taiwan, while also preventing Taipei from assuming that U.S. support is guaranteed, especially if it were to provoke China by declaring independence. The objective of this policy is to encourage restraint on both sides of the Taiwan Strait. The ambiguity surrounding the U.S. commitment to Taiwan's security has, in turn, led to Taiwan's military isolation and strengthened its self-reliance, with the island relying more on limited arms procurement from the United States.
                <sup>
                    <xref ref-type="other" rid="FN17">17</xref>
                </sup> To further strengthen security relations with Taiwan, the U.S. Congress introduced the 
                <bold>Taiwan Security Enhancement Act (TSEA)</bold> in 1999. The bill, aimed at expanding U.S. military support for the Republic of China (Taiwan), was passed by the House of Representatives with a strong majority&#x2014;341 votes in favor and 70 against. The proposed legislation included measures to increase military assistance to Taiwan, such as providing training and equipment, and establishing direct military communication channels between the United States and Taiwan. However, the bill did not pass the Senate and was never signed into law by the president and thus did not take effect.
                <sup>
                    <xref ref-type="other" rid="FN18">18</xref>
                </sup>
            </p>
            <p>After more than two decades of engagement policy with China, Washington switched gears under the Trump administration. More than 20 years after China joined the WTO with promises to carry out market reforms, U.S. businesses complained that China&#x2019;s trade and investment policies were unfavorable to U.S. and foreign businesses. In response to what was perceived as "promise fatigue," the Trump administration launched a bruising trade war with China, labeling China a "strategic competitor." As part of its broader approach, Trump approved significant arms sales to Taiwan and supported high-level exchanges of visits between U.S. and Taiwanese officials. One of the most notable moments came when Trump took a congratulatory phone call from then-President Tsai Ing-wen, marking the highest level of contact between the two sides since the 1979 break in official relations. During Trump's presidency, the State Department also removed longstanding restrictions that had governed where and how U.S. officials could meet with Taiwanese counterparts, signaling a further shift in U.S.-Taiwan relations. The Biden administration has shown a similar stance towards China, maintaining a firm approach and continuing the trade war. Under Biden, arms sales to Taiwan have persisted, and the U.S. has continued to allow official meetings between U.S. and Taiwanese officials, signaling ongoing support for Taiwan's security and sovereignty. Biden&#x2019;s policies, like those of his predecessor, reflect a commitment to countering China&#x2019;s growing influence in the region while maintaining strong relations with Taiwan.
                <sup>
                    <xref ref-type="other" rid="FN19">19</xref>
                </sup> Biden even invited Taiwanese representatives to attend his presidential inauguration.
                <sup>
                    <xref ref-type="other" rid="FN20">20</xref>
                </sup> As a further demonstration of its commitment to Taiwan&#x2019;s security, the United States engages in military training and dialogues with Taiwan while regularly conducting naval transits through the Taiwan Strait to reinforce its military presence. In August 2022, then-House Speaker Nancy Pelosi became the first Speaker to visit Taiwan since 1997, meeting with President Tsai Ing-wen a move that provoked a strong military response from China. Following Taiwan&#x2019;s 2024 presidential election, the Biden administration sent an official delegation to congratulate President-elect Lai Ching-te and President Tsai on the DPP&#x2019;s victory, reaffirming U.S. support for Taiwan&#x2019;s democracy. With Donald Trump now serving as the 47th President of the United States, uncertainty is growing in Taiwan over whether the island can continue to count on strong U.S. support&#x2014;especially in the realm of military aid. A series of statements made by President Trump since returning to office have raised concerns among Taiwanese officials about the future direction of U.S. policy. President Trump&#x2019;s recent remarks have introduced a new layer of ambiguity. While he appears to favor reducing financial commitments abroad, he has remained consistent in refusing to publicly state whether the U.S. would come to Taiwan&#x2019;s defense in the event of a Chinese attack. When asked about such a commitment in February 2025, Trump responded, &#x201c;I never comment on that. I don&#x2019;t want to ever put myself in that position.
                <sup>
                    <xref ref-type="other" rid="FN21">21</xref>
                </sup>&#x201d; This refusal to articulate a clear stance aligns with the long-standing U.S. policy of strategic ambiguity&#x2014;intentionally leaving China uncertain about the American response to a potential conflict. For Trump, this ambiguity also echoes his embrace of the &#x201c;madman theory,&#x201d; a belief that unpredictability can serve as a tactical advantage, particularly in negotiations or confrontations with adversaries like China.
                <sup>
                    <xref ref-type="other" rid="FN22">22</xref>
                </sup>
            </p>
            <p>While Taiwan continues to navigate an increasingly complex security environment, Trump&#x2019;s approach&#x2014;equal parts pressure and unpredictability&#x2014;leaves both allies and adversaries unsure of what comes next.
                <sup>
                    <xref ref-type="other" rid="FN23">23</xref>
                </sup>
            </p>
            <p>We assumed the United States has vital strategic interests at stake in the Taiwan Strait. Taiwan plays an important geostrategic role in the U.S. security calculus in the Western Pacific. Taiwan&#x2019;s location in the First Island Chain (which runs from Japan to Indonesia) anchors the U.S. network of allies that is critical to the defense of U.S. interests in the Indo-Pacific. China&#x2019;s control of Taiwan would extend the PRC&#x2019;s reach. It would allow the PRC to base underwater surveillance devices, submarines, and air defense units there, compromising U.S. military operations in the region and the ability to defend its regional allies. It would be difficult for the United States to maintain the existing balance of power in the Indo-Pacific. Taiwan is only 70 miles from Japan and 120 from the Philippines. If China annexed Taiwan, Tokyo, and Manila would question U.S. resolve in maintaining regional security. Having lost confidence in the United States, regional allies might opt to bandwagon with China or expand their own militaries, perhaps even develop nuclear weapons. Either option would further diminish U.S. influence in the region.</p>
        </sec>
        <sec>
            <title>The game in the Taiwan Strait</title>
            <p>Underlying the cross-Strait tensions is a &#x201c;balance-of-threat&#x201d; dynamic involving China, Taiwan, and the United States. According to American political scientist Stephen M. Walt, the behavior of states is shaped by the threats they perceive from other states, rather than simply by their relative power. Walt argues that states prioritize their security in response to the threats posed by others, adjusting their policies and alliances based on perceived dangers.
                <sup>
                    <xref ref-type="other" rid="FN24">24</xref>
                </sup> According to Walt, a state's threat level is determined by four key factors: proximity, overall strength, offensive capability, and perceived intentions. Nearby states pose a greater danger than distant ones, while those with larger landmass, population, and economic power are more threatening than smaller states. A state with significant offensive capabilities&#x2014;allowing it to challenge the sovereignty of others&#x2014;poses a greater threat than one focused on defense. Additionally, states with aggressive or expansionist intentions are more concerning than those committed to maintaining the status quo. When any of these factors increase, other states are likely to form alliances to counter the rising threat. In the context of the Taiwan Strait, this theory suggests that China views Taiwan as a threat to its territorial integrity and sovereignty, while Taiwan sees China's military rise and aggressive rhetoric as a direct threat to its autonomy. The United States, in turn, perceives China as a strategic competitor, and its commitment to Taiwan&#x2019;s security is partly motivated by the need to counterbalance China's growing influence in the region. Each of these actors responds to the perceived threats from the others, leading to a complex and often tense security environment in the Taiwan Strait.</p>
            <p>Our paper anticipates the behavior of the United States and China and tries to answer the question of whether the United States and China are more likely to use force or to seek accommodation in determining the future of Taiwan. We would like to clarify that our use of game theory was analogical and intentionally tailored to the specific contours of this political analysis. While we acknowledge that dynamic modeling&#x2014;such as sequential or repeated games&#x2014;could enhance the representation of long-term interactions, our goal was to apply a simplified model that foregrounds the asymmetry of interests and strategic stakes between the United States and China. We assumed the two players (the United States and China) confront four potential situations: maintaining the status quo (SQ), Taiwan's resistance
                <sup>
                    <xref ref-type="other" rid="FN25">25</xref>
                </sup> to unification (R), Taiwan's unification with China (U) and war (W) (
                <xref ref-type="table" rid="T1">Table 1</xref>). These situations can be represented as a set of possible states 
                <italic toggle="yes">S</italic> = {
                <italic toggle="yes">SQ,R,U,W</italic>}, where S is the set of all potential outcomes that may result from the interaction of the players' strategies. Each player decides on a plan of action, denoted as a strategy 
                <italic toggle="yes">s</italic>
                <sub>1</sub> for the United States and 
                <italic toggle="yes">s</italic>
                <sub>2</sub> for China. The outcome of the game is determined by the function</p>
            <disp-formula>
                <mml:math display="block" id="math1">
                    <mml:mrow>
                        <mml:mi>S</mml:mi>
                        <mml:mo stretchy="false">(</mml:mo>
                        <mml:msub>
                            <mml:mi>s</mml:mi>
                            <mml:mn>1</mml:mn>
                        </mml:msub>
                        <mml:mo>,</mml:mo>
                        <mml:msub>
                            <mml:mi>s</mml:mi>
                            <mml:mn>2</mml:mn>
                        </mml:msub>
                        <mml:mo stretchy="false">)</mml:mo>
                        <mml:mo>:</mml:mo>
                        <mml:mo>{</mml:mo>
                        <mml:msub>
                            <mml:mi>s</mml:mi>
                            <mml:mn>1</mml:mn>
                        </mml:msub>
                        <mml:mo>,</mml:mo>
                        <mml:msub>
                            <mml:mi>s</mml:mi>
                            <mml:mn>2</mml:mn>
                        </mml:msub>
                        <mml:mo>}</mml:mo>
                        <mml:mo>&#x2192;</mml:mo>
                        <mml:mi>S</mml:mi>
                        <mml:mo>,</mml:mo>
                    </mml:mrow>
                </mml:math>
            </disp-formula>
            <table-wrap id="T1" orientation="portrait" position="anchor">
                <label>Table 1. </label>
                <caption>
                    <title>Scenarios and Outcomes for the US.</title>
                </caption>
                <table content-type="article-table" frame="hsides">
                    <thead>
                        <tr>
                            <th align="center" colspan="1" rowspan="1" valign="top">Scenarios</th>
                            <th align="center" colspan="1" rowspan="1" valign="top">Description</th>
                            <th align="center" colspan="1" rowspan="1" valign="top">Outcomes for US</th>
                            <th align="center" colspan="1" rowspan="1" valign="top">Outcomes for China</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td align="left" colspan="1" rowspan="1" valign="top">
                                <bold>Taiwan</bold>
                                <break/>
                                <bold> Maintain</bold>
                                <break/>
                                <bold> Status Quo </bold>
                                <break/>
                                <bold>(SQ)</bold>
                            </td>
                            <td align="left" colspan="1" rowspan="1" valign="top">The U.S. continues strategic ambiguity, maintaining
                                <break/> the One China Policy; acknowledges Beijing&#x2019;s view
                                <break/> without consenting to it. China delays action,
                                <break/> continues harassment through PLA activities</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">Regional tranquility.
                                <break/>Continuation of U.S. Policy 
                                <break/>of &#x201c;Strategic Ambiguity&#x201d;; The 
                                <break/>status quo delays any direct 
                                <break/>confrontation between the 
                                <break/>U.S. and China over Taiwan</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">China fails to meet the objective of
                                <break/> &#x201c;Great Rejuvenation of the Chinese
                                <break/> Nation&#x201d; and restoration of China&#x2019;s
                                <break/> &#x201c;historical prestige.&#x201d; The status quo
                                <break/> allows the U.S. to maintain arms 
                                <break/>sales and informal ties with Taiwan, 
                                <break/>which China sees as a violation
                                <break/> of its sovereignty; It complicates 
                                <break/>China's efforts to isolate Taiwan 
                                <break/>diplomatically</td>
                        </tr>
                        <tr>
                            <td align="left" colspan="1" rowspan="1" valign="top">
                                <bold>Taiwan </bold>
                                <break/>
                                <bold>Resistance </bold>
                                <break/>
                                <bold>(R)</bold>
                            </td>
                            <td align="left" colspan="1" rowspan="1" valign="top">The erosion of freedoms in Hong Kong under the
                                <break/> "One Country, Two Systems" model has fueled
                                <break/> resistance in Taiwan, surveys and public opinion
                                <break/> consistently show widespread opposition to
                                <break/> unification under the PRC's terms, Taiwan continues
                                <break/> to enhance its defensive capabilities, emphasizing
                                <break/> asymmetric warfare to deter a potential invasion,
                                <break/> the U.S. has increased arms sales and military
                                <break/> coordination with Taiwan, encouraging asymmetric
                                <break/> defense (e.g., mobile missile systems, drones,
                                <break/> cyber capabilities) to make a Chinese invasion
                                <break/> costly and complex; Taiwan's democratic resistance
                                <break/> to authoritarian pressure symbolizes broader
                                <break/> ideological competition between the U.S.-led
                                <break/> democratic world and China&#x2019;s authoritarian model;,
                                <break/> Taiwan gains more international support resisting a
                                <break/> superpower like China.
                                <break/>
                                <break/> China escalates military actions, such as air and
                                <break/> naval operations, while Taiwan resists using force.</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">The United States reaffirms
                                <break/> its credibility with allies 
                                <break/>in the region. Taiwan's
                                <break/> resistance challenges 
                                <break/>China&#x2019;s ambitions and 
                                <break/>strengthens U.S. strategic 
                                <break/>positioning however 
                                <break/>increases the risk of a
                                <break/> major-power conflict. For 
                                <break/>Washington, Taiwan is 
                                <break/>not just about territory it's
                                <break/> about the future of the
                                <break/> Indo-Pacific order and 
                                <break/>U.S. leadership credibility. 
                                <break/>Taiwan's resistance aligns 
                                <break/>with U.S. efforts to deter 
                                <break/>Chinese aggression and 
                                <break/>uphold the rules-based 
                                <break/>international order.</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">Continued regional tensions without 
                                <break/>resolution, China fails to meet the 
                                <break/>objective of &#x201c;Great Rejuvenation 
                                <break/>of the Chinese Nation&#x201d; so as long 
                                <break/>as Taiwan remains administered
                                <break/> separately from the mainland, the 
                                <break/>PRC&#x2019;s &#x201c;rejuvenation&#x201d; is incomplete. 
                                <break/>Challenge to CCP Legitimacy and National Unity. This also setbacks 
                                <break/>for &#x201c;One Country, Two Systems&#x201d; 
                                <break/>Model. Taiwan&#x2019;s resistance forces 
                                <break/>China to commit more military, 
                                <break/>economic, and diplomatic resources 
                                <break/>to a single issue &#x2014; potentially at 
                                <break/>the expense of other strategic 
                                <break/>objectives. The stronger Taiwan&#x2019;s 
                                <break/>stance, the more likely it is to inspire 
                                <break/>multilateral countermeasures (e.g., 
                                <break/>sanctions, defense coordination), 
                                <break/>isolating China. Taiwan&#x2019;s continued 
                                <break/>defiance could fuel frustration 
                                <break/>or disillusionment among CCP 
                                <break/>hardliners.</td>
                        </tr>
                        <tr>
                            <td align="left" colspan="1" rowspan="1" valign="top">
                                <bold>Peaceful</bold>
                                <break/>
                                <bold> Unification </bold>
                                <break/>
                                <bold>(U)</bold>
                            </td>
                            <td align="left" colspan="1" rowspan="1" valign="top">China shrinks Taiwan's diplomatic space or
                                <break/> persuades Taiwan&#x2019;s government and people
                                <break/> that unification is in their best interest. Taiwan and 
                                <break/>China agree to union with public or governmental 
                                <break/>consent. Even peaceful unification could lead 
                                <break/>to 
                                <bold>governance challenges and long-term</bold>
                                <break/>
                                <bold> instability</bold>
                            </td>
                            <td align="left" colspan="1" rowspan="1" valign="top">China gains access to the
                                <break/> Western Pacific while the 
                                <break/>U.S. loses a regional ally
                                <break/> and credibility. China would 
                                <break/>gain a major geostrategic 
                                <break/>advantage, gaining control 
                                <break/>of Taiwan&#x2019;s territory,
                                <break/> technology, and position in 
                                <break/>key maritime routes; Taiwan 
                                <break/>is home to TSMC, a global 
                                <break/>leader in advanced chip 
                                <break/>manufacturing. Chinese 
                                <break/>control over this capability 
                                <break/>could threaten U.S. tech 
                                <break/>dominance and supply 
                                <break/>chain security.</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">China achieves the &#x201c;Great
                                <break/> Rejuvenation&#x201d; and restores 
                                <break/>&#x201c;historical prestige,&#x201d; fulfilling Xi 
                                <break/>Jinping&#x2019;s China Dream by mid-
                                <break/>century; would be a historic and 
                                <break/>strategic triumph for Beijing; its
                                <break/> integration would allow China easier
                                <break/>access to the Pacific and weaken 
                                <break/>U.S. deterrence; Would enhance
                                <break/> China's technological autonomy
                                <break/> and potentially give it leverage over
                                <break/> global chip supply chains</td>
                        </tr>
                        <tr>
                            <td align="left" colspan="1" rowspan="1" valign="top">
                                <bold>War (W)</bold>
                            </td>
                            <td align="left" colspan="1" rowspan="1" valign="top">The U.S. uses military force to prevent China&#x2019;s
                                <break/> annexation of Taiwan. Large-scale conflict between
                                <break/> China and the U.S., causing significant casualties 
                                <break/>and long-term instability.</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">High material and human
                                <break/> costs, potential U.S./Taiwan
                                <break/> defeat, global depression,
                                <break/> devastation of Taiwan. A U.S.
                                <break/> victory confirms hegemonic 
                                <break/>status in Indo-Pacific;
                                <break/> Potentially catastrophic war
                                <break/> between the world&#x2019;s two 
                                <break/>largest militaries; Would 
                                <break/>likely involve heavy losses,
                                <break/> cyberattacks, satellite
                                <break/> warfare, and possible 
                                <break/>escalation into other 
                                <break/>regions.</td>
                            <td align="left" colspan="1" rowspan="1" valign="top">War undermines PRC&#x2019;s grand
                                <break/> strategy and could discredit the 
                                <break/>notion of Taiwan as naturally part 
                                <break/>of China, risking global conflict and 
                                <break/>undermining the &#x201c;Great Revival 
                                <break/>of the Chinese Nation.&#x201d; Even with 
                                <break/>success, China&#x2019;s military would 
                                <break/>suffer severe human and material 
                                <break/>losses, straining its forces and 
                                <break/>public morale; Regime stability at 
                                <break/>risk</td>
                        </tr>
                    </tbody>
                </table>
            </table-wrap>
            <p>which maps the strategies chosen by the players to one of the possible states in S. Each player receives a payoff depending on the outcome S 
                <italic toggle="yes">S</italic>(
                <italic toggle="yes">s</italic>
                <sub>1</sub>, 
                <italic toggle="yes">s</italic>
                <sub>2</sub>), as defined in the payoff matrix</p>
            <p>The players decide on a plan of action and make decisions based on the adopted strategy. Each player receives a payoff depending on the actions chosen by the two players. Payoffs will be represented in a payoff matrix and are numerical, representing the utility or gain. A situation in which no player&#x2019;s outcome can be improved by changing its own strategy is the Nash equilibrium. At this point, each player&#x2019;s strategy is optimal, given the strategies of the other.</p>
            <p>Considering the aforementioned scenarios and outcomes, we have generated a hierarchy of preferences for the two players. The hierarchy of preferences refers to the ranking of outcomes according to a player&#x2019;s level of satisfaction or utility. This ordering of preferences helps players make strategic decisions by determining which outcomes they consider more favorable. Understanding players' preferences is crucial for predicting their behavior in games. We think that the relationship between China and the U.S. could be described as a highly noncooperative game - Chicken Game. The Chicken Game (or Chicken Dilemma) is a classic game theory model that illustrates the conflict between cooperation and risk-taking in competitive situations. The hierarchy of preferences refers to the ranking of outcomes according to a player&#x2019;s level of satisfaction or utility, denoted as 
                <italic toggle="yes">U</italic>. The hierarchy of preferences in this game highlights the asymmetric power dynamics between the f United States and China. For the United States, the preferences would be 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">R</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">SQ</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">U</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">W</italic>) or numerically 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">R</italic>) = 4, 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">SQ</italic>) = 3, 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">U</italic>) = 2, 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">W</italic>) = 1</p>
            <p>and for China,</p>
            <p>
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">U</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">SQ</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">R</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">W</italic>) or numerically 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">U</italic>) = 4, 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">SQ</italic>) = 3, 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">R</italic>) = 2, 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">W</italic>) = 1. These hierarchies reveals the assymetric power between the two players.</p>
            <p>Our model is based on the initial assumption that the interaction between the United States and China can be best understood as a non-cooperative game involving a partial conflict of interests. In such a setting, both players can simultaneously gain and lose depending on their respective decisions. While cooperation is technically possible, it is inherently unstable when structural incentives for unilateral defection exist&#x2014;especially if one actor expects to benefit more than the other. This asymmetry tends to erode mutual trust and renders collaboration fragile.</p>
            <p>We chose the Chicken Game because it effectively captures these strategic dynamics. It models scenarios in which both players are tempted to act unilaterally, even when mutual cooperation might yield more favorable outcomes. The Chicken Game (or Chicken Dilemma) is a classical model in game theory, widely used to describe high-stakes confrontations where actors seek to avoid the worst possible result&#x2014;mutual escalation&#x2014;but neither side wants to be seen as backing down first. This accurately reflects the U.S.&#x2013;China dynamic over Taiwan, where signaling strength, credibility, and strategic resolve often take precedence over compromise.</p>
            <p>In this model, the hierarchy of preferences is crucial. The best outcome for a player is to remain firm while the opponent yields&#x2014;gaining unilateral advantage. Mutual cooperation (both players swerve) is better than escalation, but still inferior to unilateral gain. The worst outcome is when neither player yields, leading to catastrophic mutual loss.</p>
            <p>These logics are often illustrated using the metaphor of two drivers racing toward one another in a deadly game of highway chicken. Each must decide independently whether to continue or swerve. If neither swerves, the result is a fatal head-on collision. If one swerves while the other continues, the latter &#x201c;wins&#x201d; by appearing fearless, while the former is labeled &#x201c;chicken&#x201d; and suffers reputational loss. If both swerve, both survive, but no one "wins" definitively.</p>
            <p>In political terms, the Chicken Game helps explain situations where actors are caught between avoiding escalation and appearing weak. This makes it particularly well-suited to model strategic brinkmanship in the Taiwan Strait, where cooperation offers limited reward, and defection carries the risk of severe costs. The game has no dominant strategy, its outcomes hinge on expectations about the other player&#x2019;s choices and on the credibility of threats.</p>
            <p>Ultimately, the Chicken Game offers a non-zero-sum framework&#x2014;a player&#x2019;s win does not entail an equal loss for the other, and both actors can be worse off simultaneously. While other models, such as repeated or sequential games, might capture long-term dynamics more fully, we selected this model for its clarity, tractability, and close alignment with the asymmetrical and risk-prone structure of U.S.&#x2013;China tensions over Taiwan.
                <sup>
                    <xref ref-type="other" rid="FN26">26</xref>
                </sup>
            </p>
            <p>What would the game look like considering the aforementioned hierarchies of preferences? For the United States, the highest value is Taiwan Resistance, represented as 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">R</italic>) = 4. For China, the highest value is peaceful unification, represented as 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">U</italic>) = 4. In this game, cooperation (C) is valued less by both players compared to defection (D), as it reflects maintaining the Status Quo without achieving their strategic objectives. The payoffs (utilities) for each combination of strategies are represented as follows:</p>
            <p>
                <bold>4</bold>	Highest payoff for the player who defects (D) while the other cooperates (C).</p>
            <p>
                <bold>3</bold>	Medium payoff if both players cooperate (C, C), both avoid the confrontation but lose face.</p>
            <p>
                <bold>2</bold>	Low payoff for the player who cooperates (C) while the other defect (D).</p>
            <p>
                <bold>1</bold>	The worst payoff where both players stay defect (D,D) - war.</p>
            <p>The payoffs for the players can thus be represented in the payoff matrix:</p>
            <disp-formula>
                <mml:math display="block" id="math2">
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                                        <mml:mn>4</mml:mn>
                                        <mml:mo>,</mml:mo>
                                        <mml:mn>2</mml:mn>
                                        <mml:mo stretchy="false">)</mml:mo>
                                    </mml:mrow>
                                </mml:mtd>
                                <mml:mtd>
                                    <mml:mrow>
                                        <mml:mo stretchy="false">(</mml:mo>
                                        <mml:mn>1</mml:mn>
                                        <mml:mo>,</mml:mo>
                                        <mml:mn>1</mml:mn>
                                        <mml:mo stretchy="false">)</mml:mo>
                                    </mml:mrow>
                                </mml:mtd>
                            </mml:mtr>
                        </mml:mtable>
                        <mml:mo stretchy="false">]</mml:mo>
                    </mml:mrow>
                </mml:math>
            </disp-formula>
            <p>In the Chicken Game, Nash pointed to two equilibria (
                <bold>Nash equilibria)</bold>: when one player cooperates (C) and the other defects (D). In each case, if one player cooperates and the other player has no incentive to change its strategy offers the highest payoff. In this particular situation, US cooperation means maintaining the Status Quo for Taiwan while defect means to help Taiwan resist unification by force. For the PRC, cooperation also means to keep the Status Quo for Taiwan, but defect for the PRC means Taiwan&#x2019;s unification with China. The payoffs are denoted as 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>) and 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>), where 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>) reflects the utility for the USA given its 
                <italic toggle="yes">i</italic> and China&#x2019;s strategy 
                <italic toggle="yes">j</italic>, and 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">i,j</italic>) similarly reflects China&#x2019;s payoffs. For the United States, the highest payoff (
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">D,C</italic>) = 4) is to help Taiwan resist unification, and for China the highest payoff (
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">C,D</italic>) = 4) is Taiwan&#x2019;s unification with the Chinese mainland (
                <xref ref-type="table" rid="T2">Table 2</xref>). The mathematical condition for Nash Equilibrium is as follows</p>
            <p>
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">D,C</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">C,C</italic>) and 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">C,D</italic>) &gt; 
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">C,C</italic>)</p>
            <table-wrap id="T2" orientation="portrait" position="anchor">
                <label>Table 2. </label>
                <caption>
                    <title>Payoff matrix.</title>
                </caption>
                <table content-type="article-table" frame="hsides">
                    <tbody>
                        <tr>
                            <th align="center" colspan="1" rowspan="4" valign="middle">USA</th>
                            <th align="center" colspan="1" rowspan="1" valign="top"/>
                            <th align="center" colspan="2" rowspan="1" valign="top">China (PRC)</th>
                        </tr>
                        <tr>
                            <th align="center" colspan="1" rowspan="1" valign="top"/>
                            <th align="center" colspan="1" rowspan="1" valign="top">cooperation</th>
                            <th align="center" colspan="1" rowspan="1" valign="top">defect</th>
                        </tr>
                        <tr>
                            <th align="center" colspan="1" rowspan="1" valign="top">cooperation</th>
                            <td align="center" colspan="1" rowspan="1" valign="middle">USA:SQ (3); PRC:SQ (3)</td>
                            <td align="center" colspan="1" rowspan="1" valign="middle">USA:U (2); PRC:U (4)</td>
                        </tr>
                        <tr>
                            <th align="center" colspan="1" rowspan="1" valign="top">defect</th>
                            <td align="center" colspan="1" rowspan="1" valign="middle">USA:R (4); PRC:R (2)</td>
                            <td align="center" colspan="1" rowspan="1" valign="middle">USA:W (1); PRC:W (1)</td>
                        </tr>
                    </tbody>
                </table>
                <table-wrap-foot>
                    <fn>
                        <p>This payoff structure reflects the dynamics of a Chicken Game with asymmetric stakes, where China&#x2019;s pursuit of peaceful unification represents a strategic imperative tied to national identity, while the United States prioritizes regional stability and ally credibility, resulting in differing levels of urgency and risk tolerance that shape their strategic decisions.</p>
                    </fn>
                </table-wrap-foot>
            </table-wrap>
            <p>This condition demonstrates that neither player has an incentive to unilaterally change their strategy. These Nash Equilibria illustrate the asymmetric stakes and strategic priorities of the two players.</p>
            <p>The asymmetry in stakes between the United States and can be quantified using a utility gap metric, which measures the divergence in payoffs between the players under their respective highest-priority outcomes. This metric provides a quantitative representation of the differing levels of urgency and strategic importance attributed to these outcomes by each player. The utility gap is defined as &#x0394;
                <italic toggle="yes">U</italic> = |
                <italic toggle="yes">U
                    <sub>China</sub>
                </italic>(
                <italic toggle="yes">C,D</italic>) &#x2013; 
                <italic toggle="yes">U
                    <sub>USA</sub>
                </italic>(
                <italic toggle="yes">D,C</italic>)|. In this game &#x0394;
                <italic toggle="yes">U</italic> = 0. While the utility gap is equal in absolute terms, the qualitative interpretation of these payoffs highlights the underlying asymmetry.</p>
            <p>The most rational behavior to win this game would be to adopt an empathetic strategy. In this case, one player would empathize with the other player's way of thinking, i.e., respond to a peaceful strategy with a martial one and vice versa. Some analyzing the Chicken Game believe that the sure winner in this game will be the player-state considered ready for anything (crazy-madman strategy). If players are uncertain about the other party's willingness to withdraw (cooperation), they may adopt a mixed strategy in which they do not state their preferences, leading them to become less predictable (policy of ambiguity).</p>
            <p>The geostrategic realities of the Western Pacific make the defense of Taiwan vital to U.S. national security interests. Defending Taiwan will be possible by strengthening the PRC containment coalition. The United States must consider whether some U.S. allies and partners in the region will recognize the importance of Taiwan to their own interests and will therefore be willing to engage directly in its defense. Others, however, might prioritize the threats that China directly poses to them higher than defending Taiwan.
                <sup>
                    <xref ref-type="other" rid="FN27">27</xref>
                </sup> The United States chooses its commitment level to defend Taiwan against mainland China. This commitment level can be operationalized as the probability that the United States will join the war to defend Taiwan if mainland China attacks Taiwan. It is also important to consider how U.S. allies in the region will behave. The question is whether they will support the U.S.</p>
        </sec>
        <sec sec-type="conclusions">
            <title>Conclusion</title>
            <p>An August 2024 Brookings report by Michael E. O&#x2019;Hanlon raised the pressing question of whether the United States and China could truly go to war&#x2014;and if so, under what conditions and with what consequences.
                <sup>
                    <xref ref-type="other" rid="FN28">28</xref>
                </sup> O&#x2019;Hanlon identifies a PRC blockade of Taiwan as the most likely scenario for escalating tensions across the Taiwan Strait. To prevent such a development, he advocates a strategy of enhanced deterrence, urging the United States to work closely with its allies to project unity and resolve. He further emphasizes that deterrence must be both military and economic with military preparation focusing on Taiwan&#x2019;s defense and economic policy aimed at ensuring allied resilience against prolonged confrontation.</p>
            <p>O&#x2019;Hanlon distinguishes between "peaceful" and "war" strategies on both sides: for China, a blockade may be framed as peaceful, while direct attacks signify war; for the U.S., withdrawal is peaceful, whereas military intervention constitutes war. These distinctions align with the logic of game theory, particularly the Chicken Game, where each side must weigh the risks of escalation against the costs of concession.</p>
            <p>In the cooperative scenario (the "rewards" path), both parties avoid escalation and preserve the status quo, perhaps through compromise. In the defect-defect scenario (the "penalties" path), mutual intransigence could result in war, even total war. Thus, U.S.&#x2013;China relations over Taiwan fluctuate between tension, deterrence, and d&#x00e9;tente, depending on reciprocal actions and shifting strategic calculations.</p>
            <p>However, the applicability of game theory&#x2014;particularly in its static form&#x2014;has its limits. Game theory assumes rational actors with stable preference hierarchies and often abstracts from social, historical, and ideological contexts. It does not account for domestic political pressures, emotion-driven misperceptions, or shifts in leadership that may fundamentally alter strategic choices. As such, while the model offers useful insights into the structural logic of interaction, it cannot fully capture the evolving nature of real-world decision-making.</p>
            <p>For example, the return of Donald Trump to the U.S. presidency has reintroduced strategic ambiguity, in contrast to Biden&#x2019;s more explicit commitments. Trump&#x2019;s mixed signals&#x2014;ranging from criticism of Taiwan&#x2019;s role in the chip industry to his reluctance to engage in foreign wars&#x2014;underscore the instability of deterrence under changing leadership.
                <sup>
                    <xref ref-type="other" rid="FN29">29</xref>
                </sup> As Bonnie Glaser of the German Marshall Fund has noted, Trump&#x2019;s aversion to military entanglements does not necessarily preclude a forceful response to Chinese aggression, but it does introduce additional uncertainty into the strategic equation.
                <sup>
                    <xref ref-type="other" rid="FN30">30</xref>
                </sup>
            </p>
            <p>Public support is another critical unknown. If U.S. and European leaders struggled to mobilize public opinion against Russia after its invasion of Ukraine, it is unclear whether they could sustain domestic backing for a military confrontation with China a far more powerful adversary with deep global economic ties.</p>
            <p>In this complex and shifting environment, a compromise outcome that maintains the status quo appears to be the most plausible, but not inevitable, solution. The logic of the Chicken Game suggests that as long as both actors perceive existential risks in escalation, they are incentivized to cooperate out of fear, not trust. Yet, the game&#x2019;s outcome is not predetermined: changes in leadership, national priorities, or alliance dynamics may tilt the balance toward either confrontation or accommodation.</p>
            <p>Thus, while the Taiwan Strait remains a textbook case of strategic brinkmanship, the interaction between Beijing and Washington is shaped not only by rational choice but by evolving geopolitical conditions. Recognizing these factors is crucial for understanding the limitations of predictive models&#x2014;and for crafting policies that are responsive to the deeper volatility at the heart of U.S.&#x2013;China relations.</p>
        </sec>
        <sec>
            <title>Ethics and consent</title>
            <p>Ethical approval and consent were not required.</p>
        </sec>
    </body>
    <back>
        <sec sec-type="data-availability">
            <title>Data availability statement</title>
            <p>No data is associated with this article.</p>
        </sec>
        <fn-group>
            <fn>
                <p id="FN1">
                    <sup>1</sup> The Global Risks Report 2022, 17
                    <sup>th</sup> Edition, accessed May 17, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www3.weforum.org/docs/WEF_The_Global_Risks_Report_2022.pdf">https://www3.weforum.org/docs/WEF_The_Global_Risks_Report_2022.pdf</ext-link>; The Global Risk Report 2023, 18
                    <sup>th</sup> Edition, accessed May 17 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www3.weforum.org/docs/WEF_Global_Risks_Report_2023.pdf">https://www3.weforum.org/docs/WEF_Global_Risks_Report_2023.pdf</ext-link>; The Global Risk Report 2024, 19
                    <sup>th</sup> Edition, accessed September 2, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www3.weforum.org/docs/WEF_The_Global_Risks_Report_2024.pdf">https://www3.weforum.org/docs/WEF_The_Global_Risks_Report_2024.pdf</ext-link>.</p>
                <p id="FN2">
                    <sup>2</sup> The "Madman Theory" is a foreign policy strategy where a leader deliberately cultivates an image of irrationality and unpredictability to deter adversaries by making them believe the leader is capable of anything, even actions that would normally be considered irrational. This theory suggests that by appearing unstable and willing to take extreme risks, a leader can gain a negotiating advantage.</p>
                <p id="FN3">
                    <sup>3</sup> The current situation in the Taiwan Strait was recently analyzed in the article: A. W. Zi&#x0119;tek, E. F. Larus: &#x201c;Taiwan: One of the Most Dangerous Places in the World&#x201d;, In: Contemporary Security Problems of Poland and the Czech Republic, ed. E. Kancik-Ko&#x0142;tun (Lublin, Maria Curie-Sk&#x0142;odowska University Press, 2024)</p>
                <p id="FN4">
                    <sup>4</sup> J. P. Kahan, A. Rapoport, 
                    <italic toggle="yes">Theories of Coalitions Formation</italic>, (New York, London: Routledge, 1984), 3.</p>
                <p id="FN5">
                    <sup>5</sup> Ibidem.</p>
                <p id="FN6">
                    <sup>6</sup> J. von Neuman, O. Morgenstern, 
                    <italic toggle="yes">Theory of Games and Economic Behavior</italic>, (Princeton: Princeton University Press, 1944), 9&#x2013;13.</p>
                <p id="FN7">
                    <sup>7</sup> Z. J. Pietra&#x015b;, 
                    <italic toggle="yes">Decydowanie polityczne</italic>, (Warszawa, Kark&#x00f3;w: Wydawnictwo Naukowe PWN, 1998), 182.</p>
                <p id="FN8">
                    <sup>8</sup> &#x0141;. Gacek, E. Trojnar, 
                    <italic toggle="yes">Pokojowe negocjacje czy twarda gra? Rozw&#x00f3;j stosunk&#x00f3;w ponad Cie&#x015b;nin&#x0105; Tajwa&#x0144;sk&#x0105;</italic>, (Krak&#x00f3;w: Ksi&#x0119;garnia Akademicka, 2013), 16; E. Larus, A.W. Zi&#x0119;tek, &#x201c;
                    <italic toggle="yes">Taiwan's Military Posture Toward China's Confrontational Stance</italic>,&#x201d; in: 
                    <italic toggle="yes">Taiwan Environmental, Political and Social Issues</italic>, ed. C. M. Clark, K. Ho, A. C. Tan (New York: Nova Science Publisher, 2021).</p>
                <p id="FN9">
                    <sup>9</sup> &#x0141;. Gacek, E. Trojnar, 
                    <italic toggle="yes">Pokojowe negocjacje,</italic> 23.</p>
                <p id="FN10">
                    <sup>10</sup> Office of the President Republic of China (Taiwan), &#x201c;Inaugural address of ROC 14th-term President Tsai Ing-wen&#x201d;, May 20, 2016, accessed May 17, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://english.president.gov.tw/News/4893">https://english.president.gov.tw/News/4893</ext-link>.</p>
                <p id="FN11">
                    <sup>11</sup> S. Lau, &#x201c;China skeptic wins Taiwan presidency in snub to Beijing&#x201d; January 13, 2024, accessed May 20, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.politico.eu/article/william-lai-takes-early-lead-in-taiwan-presidential-race-in-snub-to-beijing/">https://www.politico.eu/article/william-lai-takes-early-lead-in-taiwan-presidential-race-in-snub-to-beijing/</ext-link>.</p>
                <p id="FN12">
                    <sup>12</sup> Office of the President Republic of China (Taiwan), &#x201c;Inaugural Address of ROC 16th-term President Lai Ching-te&#x201d;, May 20, 2024, accessed September 10, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://english.president.gov.tw/News/6726">https://english.president.gov.tw/News/6726</ext-link>.</p>
                <p id="FN13">
                    <sup>13</sup> Ministry of National Defense of the People&#x2019;s Republic of China, May 21, 2024, accessed September 10, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="http://www.mod.gov.cn/gfbw/jmsd/16310117.html">http://www.mod.gov.cn/gfbw/jmsd/16310117.html</ext-link>.</p>
                <p id="FN14">
                    <sup>14</sup> Taiwan Documents, 1982, &#x201c;The &#x2018;Six Assurances&#x2019; to Taiwan,&#x201d; accessed May 17, 2023, 
                    <ext-link ext-link-type="uri" xlink:href="http://www.taiwandocuments.org/assurances.htm">http://www.taiwandocuments.org/assurances.htm</ext-link>.</p>
                <p id="FN15">
                    <sup>15</sup> E. F. Larus, A. W Zi&#x0119;tek, &#x201c;
                    <italic toggle="yes">Taiwan's Military</italic>.&#x201d;</p>
                <p id="FN16">
                    <sup>16</sup> F. Grzegorzewski, &#x201c;Strategic Ambiguity in US-Taiwan Relations During the Donald Trump Administration,&#x201d; in: 
                    <italic toggle="yes">Polish Political Science Yearbook</italic>, vol. 51 (2022), pp. 59&#x2013;74.</p>
                <p id="FN17">
                    <sup>17</sup> E. Trojnar, &#x201c;Taiwan-China-United States Relations: Taiwan&#x2019;s Unique safe House for Better or Worse,&#x201d; in: 
                    <italic toggle="yes">Taiwan&#x2019;s Exceptionalism</italic>, ed. A. Rudakowska, E. Trojnar, A. Zi&#x0119;tek (Krak&#x00f3;w: Jagiellonian University Press, 2019), 60.</p>
                <p id="FN18">
                    <sup>8</sup> H.R.1838 - Taiwan Security Enhancement Act, accessed July 19, 2025, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.congress.gov/bill/106th-congress/house-bill/1838">https://www.congress.gov/bill/106th-congress/house-bill/1838</ext-link>
                </p>
                <p id="FN19">
                    <sup>19</sup> U.S. Department of State, &#x201c;New Guidelines for U.S. Government Interactions with Taiwan Counterparts&#x201d;, April 19, 2021, accessed May 20, 2023, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.state.gov/new-guidelines-for-u-s-government-interactions-with-taiwan-counterparts/">https://www.state.gov/new-guidelines-for-u-s-government-interactions-with-taiwan-counterparts/</ext-link>.</p>
                <p id="FN20">
                    <sup>20</sup> Council on Foreign Relations, &#x201c;Biden Administration Sends Important Signals for the Future of U.S.-Taiwan Ties&#x201d;, January 28, 2021, accessed May 20, 2023, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.cfr.org/blog/biden-administration-sends-important-signals-future-us-taiwan-ties">https://www.cfr.org/blog/biden-administration-sends-important-signals-future-us-taiwan-ties</ext-link>.</p>
                <p id="FN21">
                    <sup>21</sup> 
                    <ext-link ext-link-type="uri" xlink:href="https://www.reuters.com/world/trump-declines-answer-question-about-china-taiwan-2025-02-26/">https://www.reuters.com/world/trump-declines-answer-question-about-china-taiwan-2025-02-26/</ext-link>, accessed July 20, 2025.</p>
                <p id="FN22">
                    <sup>22</sup> T. J. Shattuck, &#x201c;The Return to Strategic Ambiguity: Assessing Trump&#x2019;s Taiwan Stance&#x201d;, 
                    <italic toggle="yes">Foreign Policy Research Institute</italic>, May 7, 2025, accessed July 20,2025, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.fpri.org/article/2025/05/the-return-to-strategic-ambiguity-assessing-trumps-taiwan-stance/">https://www.fpri.org/article/2025/05/the-return-to-strategic-ambiguity-assessing-trumps-taiwan-stance/</ext-link>.</p>
                <p id="FN23">
                    <sup>23</sup> R. Hsiao, &#x201c;Taiwan Policy under the Second Trump Administration&#x201d;, 
                    <italic toggle="yes">Global Taiwan Brief</italic>, Vol. 9, Issue 22 (2024), accessed September 20, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://globaltaiwan.org/2024/11/taiwan-policy-under-the-second-trump-administration/">https://globaltaiwan.org/2024/11/taiwan-policy-under-the-second-trump-administration/</ext-link>.</p>
                <p id="FN24">
                    <sup>24</sup> S. M. Walt, &#x201c;Alliance Formation and Balance of World Power&#x201d;, 
                    <italic toggle="yes">International Security</italic> vol. 9, no. 4 (1985), 3&#x2013;43.</p>
                <p id="FN25">
                    <sup>25</sup> We are using the term &#x201c;Resistance&#x201d; rather than &#x201c;Independence&#x201d; because we believe that it is unrealistic to include Taiwan Independence in the game. Public opinion polls consistently indicate low preference for independence as soon as possible (3.8% in recent polls). Only 22% of recent poll respondents favor maintaining the status quo but moving toward independence. A plurality of poll respondents (33.6%) support indefinitely maintaining the status quo, see: Election Study Center, National Chengchi University, July 8, 2024, accessed September 20, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://esc.nccu.edu.tw/PageDoc/Detail?fid=7801&amp;id=6963">https://esc.nccu.edu.tw/PageDoc/Detail?fid=7801&amp;id=6963</ext-link>.</p>
                <p id="FN26">
                    <sup>26</sup> This article offers an analytical model based on a Chicken Game with asymmetric stakes, providing a simplified framework to understand the complex dynamics of the Taiwan Strait. Due to space limitations, a full empirical validation of the model was not included. Future research could examine selected case studies&#x2014;such as the 1995&#x2013;1996 Taiwan Strait Crisis or Nancy Pelosi&#x2019;s 2022 visit&#x2014;to assess whether the logic of the Chicken Game adequately captures real-world decision-making. It is also possible that alternative game-theoretic models (e.g., repeated games, sequential games, or games with incomplete information) might better explain specific situations</p>
                <p id="FN27">
                    <sup>27</sup> D. Blumenthal, F. W. Kagan, J. Baumel, C. Chen, F. de Beixedon, L. Rank, and A. Turek, 
                    <italic toggle="yes">From Coercion to Capitulation. How China Can Take Taiwan Without a War</italic>, (AMERICAN ENTERPRISE INSTITUTE May 2024), 5, accessed September 20, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.aei.org/research-products/report/from-coercion-to-capitulation-how-china-can-take-taiwan-without-a-war/">https://www.aei.org/research-products/report/from-coercion-to-capitulation-how-china-can-take-taiwan-without-a-war/</ext-link>.</p>
                <p id="FN28">
                    <sup>28</sup> M. O&#x2019;Hanlon, &#x201c;Could the United States and China really go to war? Who would win?&#x201d;, Brookings (August 15, 2024), accessed October 10, 2024, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.brookings.edu/articles/could-the-united-states-and-china-really-go-to-war-who-would-win/?utm_campaign=This%20Week%20in%20Foreign%20Policy&amp;utm_medium=email&amp;utm_content=320450663&amp;&amp;utm_source=hs_email">https://www.brookings.edu/articles/could-the-united-states-and-china-really-go-to-war-who-would-win/?utm_campaign=This%20Week%20in%20Foreign%20Policy&amp;utm_medium=email&amp;utm_content=320450663&amp;utm_source=hs_email</ext-link>.</p>
                <p id="FN29">
                    <sup>29</sup> R. C. Bush, 
                    <italic toggle="yes">Difficult Choices: Taiwan&#x2019;s Quest for Security and the Good Life</italic>, (Washington, DC: Brookings Institution Press, 2021).</p>
                <p id="FN30">
                    <sup>30</sup> Would Donald Trump Defend Taiwan? Newsweek (April 8, 2025), accessed April 8, 2025, 
                    <ext-link ext-link-type="uri" xlink:href="https://www.newsweek.com/donald-trump-china-taiwan-us-defense-2056293">https://www.newsweek.com/donald-trump-china-taiwan-us-defense-2056293</ext-link>
                </p>
            </fn>
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    <sub-article article-type="reviewer-report" id="report29436">
        <front-stub>
            <article-id pub-id-type="doi">10.21956/stomiedintrelat.19576.r29436</article-id>
            <title-group>
                <article-title>Reviewer response for version 2</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Zreik</surname>
                        <given-names>Mohamad</given-names>
                    </name>
                    <xref ref-type="aff" rid="r29436a1">1</xref>
                    <role>Referee</role>
                    <uri content-type="orcid">https://orcid.org/0000-0002-6812-6529</uri>
                </contrib>
                <aff id="r29436a1">
                    <label>1</label>Institute of International and Regional Studies,, Sun Yat-Sen University, Zhuhai, China</aff>
            </contrib-group>
            <author-notes>
                <fn fn-type="conflict">
                    <p>
                        <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>8</day>
                <month>9</month>
                <year>2025</year>
            </pub-date>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Zreik M</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access peer review report distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <related-article ext-link-type="doi" id="relatedArticleReport29436" related-article-type="peer-reviewed-article" xlink:href="10.12688/stomiedintrelat.17927.2"/>
            <custom-meta-group>
                <custom-meta>
                    <meta-name>recommendation</meta-name>
                    <meta-value>approve-with-reservations</meta-value>
                </custom-meta>
            </custom-meta-group>
        </front-stub>
        <body>
            <p>This paper presents a thoughtful application of game theory to U.S.-China-Taiwan relations. The study design is sound in terms of its theoretical analysis and academic merit, effectively using game theory to explore strategic decisions. However, the presentation could benefit from clearer engagement with the literature, particularly regarding Taiwan&#x2019;s role as a player in the model.</p>
            <p> The methods and analysis section lacks sufficient detail for full replication, especially in terms of how the payoff matrix was constructed and justified. Including more transparency about assumptions and calculations would strengthen the paper.</p>
            <p> While the conclusions are plausible, they would be more robust if the paper integrated empirical examples and addressed non-rational factors, such as domestic political dynamics, which could alter strategic outcomes. The treatment of Taiwan as merely a central stake in the game (without agency) could be expanded to better reflect its political realities.</p>
            <p> </p>
            <p> To improve the paper, the authors should:</p>
            <p> - Provide clearer explanations of the game theory methods, especially the payoff matrix.</p>
            <p> - Integrate Taiwan more fully into the analysis as a player, not just as a stake.</p>
            <p> - Expand the discussion of how political factors beyond pure strategic logic may impact outcomes.</p>
            <p>Is the study design appropriate and does the work have academic merit?</p>
            <p>Yes</p>
            <p>If applicable, is the statistical analysis and its interpretation appropriate?</p>
            <p>Not applicable</p>
            <p>Is the work clearly and accurately presented and does it engage with the current literature?</p>
            <p>Partly</p>
            <p>Are the conclusions drawn adequately supported by the results?</p>
            <p>Partly</p>
            <p>Are sufficient details of methods and analysis provided to allow replication by others?</p>
            <p>Partly</p>
            <p>Are all the source data and materials underlying the results available?</p>
            <p>No source data required</p>
            <p>Reviewer Expertise:</p>
            <p>International Relations</p>
            <p>I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above.</p>
        </body>
    </sub-article>
    <sub-article article-type="reviewer-report" id="report29342">
        <front-stub>
            <article-id pub-id-type="doi">10.21956/stomiedintrelat.19576.r29342</article-id>
            <title-group>
                <article-title>Reviewer response for version 2</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Zhou</surname>
                        <given-names>Wenxing</given-names>
                    </name>
                    <xref ref-type="aff" rid="r29342a1">1</xref>
                    <role>Referee</role>
                    <uri content-type="orcid">https://orcid.org/0000-0002-6590-9042</uri>
                </contrib>
                <aff id="r29342a1">
                    <label>1</label>Nanjing University, Nanjing, China</aff>
            </contrib-group>
            <author-notes>
                <fn fn-type="conflict">
                    <p>
                        <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>5</day>
                <month>9</month>
                <year>2025</year>
            </pub-date>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Zhou W</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access peer review report distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <related-article ext-link-type="doi" id="relatedArticleReport29342" related-article-type="peer-reviewed-article" xlink:href="10.12688/stomiedintrelat.17927.2"/>
            <custom-meta-group>
                <custom-meta>
                    <meta-name>recommendation</meta-name>
                    <meta-value>approve</meta-value>
                </custom-meta>
            </custom-meta-group>
        </front-stub>
        <body>
            <p>Thank you to the authors for your thoughtful response to my previous review comments. I believe the authors have provided a relatively comprehensive response to the concerns and questions I raised, and therefore, I consider this paper to have met the requirements for acceptance.</p>
            <p> </p>
            <p> What remains my primary focus and concern is still the theoretical analysis section. As we all know, a high degree of abstraction is an inevitable step in the theorization of social sciences, although this approach may inevitably lead us to overlook many variables that could be considered highly important from certain perspectives. The authors have responded to the omission of Taiwan&#x2019;s agency as an independent strategic actor, as well as its political, military, economic, and social interests. However, due to various reasons, these aspects can only be further improved and deepened by other researchers in the future.</p>
            <p> </p>
            <p> I believe that acknowledging the limitations of theoretical reasoning while not giving up on attempts and efforts is perhaps precisely what makes the social sciences so compelling.</p>
            <p>Is the study design appropriate and does the work have academic merit?</p>
            <p>Yes</p>
            <p>If applicable, is the statistical analysis and its interpretation appropriate?</p>
            <p>Not applicable</p>
            <p>Is the work clearly and accurately presented and does it engage with the current literature?</p>
            <p>Partly</p>
            <p>Are the conclusions drawn adequately supported by the results?</p>
            <p>Yes</p>
            <p>Are sufficient details of methods and analysis provided to allow replication by others?</p>
            <p>Yes</p>
            <p>Are all the source data and materials underlying the results available?</p>
            <p>No source data required</p>
            <p>Reviewer Expertise:</p>
            <p>Taiwan Studies, China-U.S. relations, international relations, American Studies</p>
            <p>I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.</p>
        </body>
    </sub-article>
    <sub-article article-type="reviewer-report" id="report29343">
        <front-stub>
            <article-id pub-id-type="doi">10.21956/stomiedintrelat.19576.r29343</article-id>
            <title-group>
                <article-title>Reviewer response for version 2</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Rudakowska</surname>
                        <given-names>Anna</given-names>
                    </name>
                    <xref ref-type="aff" rid="r29343a1">1</xref>
                    <role>Referee</role>
                    <uri content-type="orcid">https://orcid.org/0000-0002-5107-5788</uri>
                </contrib>
                <aff id="r29343a1">
                    <label>1</label>Tamkang University, Taipei, Taiwan</aff>
            </contrib-group>
            <author-notes>
                <fn fn-type="conflict">
                    <p>
                        <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>30</day>
                <month>8</month>
                <year>2025</year>
            </pub-date>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Rudakowska A</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access peer review report distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <related-article ext-link-type="doi" id="relatedArticleReport29343" related-article-type="peer-reviewed-article" xlink:href="10.12688/stomiedintrelat.17927.2"/>
            <custom-meta-group>
                <custom-meta>
                    <meta-name>recommendation</meta-name>
                    <meta-value>approve</meta-value>
                </custom-meta>
            </custom-meta-group>
        </front-stub>
        <body>
            <p>After reading the revised comments, I would like to approve the article for acceptance.</p>
            <p>Is the study design appropriate and does the work have academic merit?</p>
            <p>Yes</p>
            <p>If applicable, is the statistical analysis and its interpretation appropriate?</p>
            <p>Yes</p>
            <p>Is the work clearly and accurately presented and does it engage with the current literature?</p>
            <p>Yes</p>
            <p>Are the conclusions drawn adequately supported by the results?</p>
            <p>Yes</p>
            <p>Are sufficient details of methods and analysis provided to allow replication by others?</p>
            <p>Yes</p>
            <p>Are all the source data and materials underlying the results available?</p>
            <p>Yes</p>
            <p>Reviewer Expertise:</p>
            <p>Taiwan paradiplomacy, Cross-strait Relations, EU-China-Taiwan relations</p>
            <p>I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.</p>
        </body>
    </sub-article>
    <sub-article article-type="reviewer-report" id="report29108">
        <front-stub>
            <article-id pub-id-type="doi">10.21956/stomiedintrelat.19242.r29108</article-id>
            <title-group>
                <article-title>Reviewer response for version 1</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Rudakowska</surname>
                        <given-names>Anna</given-names>
                    </name>
                    <xref ref-type="aff" rid="r29108a1">1</xref>
                    <role>Referee</role>
                    <uri content-type="orcid">https://orcid.org/0000-0002-5107-5788</uri>
                </contrib>
                <aff id="r29108a1">
                    <label>1</label>Tamkang University, Taipei, Taiwan</aff>
            </contrib-group>
            <author-notes>
                <fn fn-type="conflict">
                    <p>
                        <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>18</day>
                <month>7</month>
                <year>2025</year>
            </pub-date>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Rudakowska A</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access peer review report distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <related-article ext-link-type="doi" id="relatedArticleReport29108" related-article-type="peer-reviewed-article" xlink:href="10.12688/stomiedintrelat.17927.1"/>
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        </front-stub>
        <body>
            <p>The article, 
                <italic>&#x201c;The Taiwan Game: Navigating U.S.-China Tensions from a Game Theory Perspective&#x201d;,</italic> applies game theory to analyse the strategies and decision-making processes of the United States and China in the cross-Strait conflict. It is timely and written in an accessible manner. It introduces game theory and provides a clear explanation of cross-Strait relations.</p>
            <p> However, several aspects require clarification and development. 
                <list list-type="order">
                    <list-item>
                        <p>Clarification of Game Theory Approach</p>
                        <p> The article lacks specification of which branch or model of game theory it employs. And why is the Chicken Game chosen over other models? A brief discussion justifying the choice of the Chicken Game and its suitability to the Taiwan Strait context is necessary. Alternatively, the authors could explore whether other models offer better analytical leverage.</p>
                    </list-item>
                    <list-item>
                        <p>Absence of Taiwan as a Strategic Actor</p>
                        <p> Taiwan is treated as a passive entity, rather than as an actor with its own preferences, agency, and strategic options. This is particularly problematic in a model that frames the U.S.-China dynamic as a bilateral Chicken Game. Given that Taiwan&#x2019;s actions&#x2014;both domestic and diplomatic&#x2014;can influence the outcomes, its absence is analytically limiting. The authors should consider a three-player model or justify Taiwan&#x2019;s omission. Additionally, the current structure leads to inconsistencies across scenarios: some include only China and the U.S. (e.g., &#x201c;Taiwan Maintains Status Quo&#x201d;), while others (e.g., &#x201c;Peaceful Unification&#x201d;) imply direct interaction between Taiwan and China without U.S. involvement.</p>
                    </list-item>
                    <list-item>
                        <p>Oversimplification of Outcomes in Table 1</p>
                        <p> The outcome descriptions in Table 1 for both the United States and China warrant critical revision. For example, in the &#x201c;Taiwan Resistance&#x201d; row, the U.S. is described as reaffirming credibility with allies. While this is plausible, the description omits negative externalities such as the potential for economic retaliation from China, regional destabilization, or accidental escalation. Similarly, for China, outcomes under the &#x201c;Resistance&#x201d; scenario could include reputational damage or domestic political backlash, all of which are omitted. These simplifications distort the preference hierarchies. The authors should either provide justification for these simplifications or introduce alternative scenarios reflecting a broader range of plausible outcomes. The solution would be to revise and possibly add various outcomes, or to justify the choice of certain outcomes with references to the literature.</p>
                    </list-item>
                    <list-item>
                        <p>Understatement of China&#x2019;s Strategic Ambitions. The article underestimates China. In particular, the current formulation omits one of the potential outcomes: a PRC victory that results in Chinese hegemony in the Indo-Pacific. This scenario would be the logical strategic consequence of a successful unification or U.S. retreat and should be reflected in the model. If the terms &#x201c;Great Rejuvenation&#x201d; and &#x201c;historical prestige&#x201d; are meant to encompass such outcomes, this should be explicitly clarified.</p>
                    </list-item>
                    <list-item>
                        <p>Conceptual Inconsistency Regarding the Constitution of the Republic of China</p>
                        <p> The article references the ROC Constitution in two contradictory ways: once to affirm Taiwan&#x2019;s political identity and institutional continuity (p. 4, col. 2), and again to suggest adherence to a one-China framework (p. 5, col. 1). This dual interpretation is confusing and requires clarification.</p>
                    </list-item>
                    <list-item>
                        <p>Academic Neutrality and Framing</p>
                        <p> There are moments where the article appears to adopt a pro-Taiwanese framing. For instance, on p. 5, left column, the statement &#x201c;This does not change the fact that China&#x2019;s state-run media accused Lai&#x2026;&#x201d; downplays the ideological content of Lai&#x2019;s statements. Given that Lai has publicly advocated for a distinct Taiwanese identity and independence-leaning policies, the article should at least acknowledge that his rhetoric may be interpreted as provocative from the PRC's perspective. A more balanced treatment would enhance academic neutrality.</p>
                    </list-item>
                    <list-item>
                        <p>Conclusion Lacks Reflexivity</p>
                        <p> The conclusion would benefit from a brief discussion of the limitations of game theory. Additionally, it would be valuable to include reflections on how changing conditions (e.g., leadership turnover) might alter the structure and outcomes of the game.</p>
                    </list-item>
                    <list-item>
                        <p>Minor Revisions and Corrections</p>
                    </list-item>
                </list> 
                <list list-type="bullet">
                    <list-item>
                        <p>Page 4, footnote 6: Correct &#x201c;Kark&#x00f3;w&#x201d; to &#x201c;Krak&#x00f3;w.&#x201d;</p>
                    </list-item>
                    <list-item>
                        <p>Page 4, right column: Replace Chinese characters &#x201c;民族化 bentuhua&#x201d; with &#x201c;本土化 bentuhua.&#x201d;</p>
                    </list-item>
                    <list-item>
                        <p>Page 6, left column: The sentence &#x201c;...signalling ongoing support for Taiwan&#x2019;s security and sovereignty&#x201d; should be revised. The U.S. supports Taiwan&#x2019;s security, but it maintains strategic ambiguity regarding sovereignty.&#x00a0;</p>
                    </list-item>
                </list> In summary, while the article presents a valuable and timely framework for analyzing U.S.-China tensions over Taiwan, its analytical precision, theoretical justification, and neutrality would benefit from revision.</p>
            <p>Is the study design appropriate and does the work have academic merit?</p>
            <p>Yes</p>
            <p>If applicable, is the statistical analysis and its interpretation appropriate?</p>
            <p>Yes</p>
            <p>Is the work clearly and accurately presented and does it engage with the current literature?</p>
            <p>Yes</p>
            <p>Are the conclusions drawn adequately supported by the results?</p>
            <p>Yes</p>
            <p>Are sufficient details of methods and analysis provided to allow replication by others?</p>
            <p>Yes</p>
            <p>Are all the source data and materials underlying the results available?</p>
            <p>Yes</p>
            <p>Reviewer Expertise:</p>
            <p>Taiwan paradiplomacy, Cross-strait Relations, EU-China-Taiwan relations</p>
            <p>I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above.</p>
        </body>
        <sub-article article-type="response" id="comment3399-29108">
            <front-stub>
                <contrib-group>
                    <contrib contrib-type="author">
                        <name>
                            <surname>Zi&#x0119;tek </surname>
                            <given-names>Agata </given-names>
                        </name>
                        <aff>International Political Relations, Institute of International Relations, Lublin, Poland</aff>
                    </contrib>
                </contrib-group>
                <author-notes>
                    <fn fn-type="conflict">
                        <p>
                            <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                    </fn>
                </author-notes>
                <pub-date pub-type="epub">
                    <day>28</day>
                    <month>7</month>
                    <year>2025</year>
                </pub-date>
            </front-stub>
            <body>
                <p>
                    <bold>We appreciate the reviewer&#x2019;s thoughtful observations on the following points:</bold> 
                    <bold>1. Clarification of the Game Theory Approach</bold>
                </p>
                <p> We thank the reviewer for noting the need to clarify the theoretical grounding of our game-theoretic approach and for prompting us to justify our specific choice of the Chicken Game. We have added a concise explanation of this rationale to the manuscript, clarifying that our approach is rooted in non-cooperative game theory. We also acknowledge that other models&#x2014;particularly sequential or repeated games&#x2014;may provide valuable alternative perspectives, and we encourage future research to explore these possibilities further. 
                    <bold>2. Absence of Taiwan as a Strategic Actor</bold>
                </p>
                <p> We appreciate the reviewer&#x2019;s thoughtful observation regarding the exclusion of Taiwan as an independent strategic actor in our model. We fully recognize that this choice may appear analytically limiting, particularly given Taiwan&#x2019;s agency and its historical role in shaping cross-Strait dynamics. However, our primary objective in this article was to model the bilateral strategic tensions between the United States and the People&#x2019;s Republic of China, as framed through the lens of game theory. In this context, Taiwan is treated as the central stake over which both actors compete, rather than as a third player within the game-theoretic structure. This framing is deliberate and is reflected in the title of the article: 
                    <italic>The Taiwan Game: Navigating U.S.&#x2013;China Tensions from a Game Theory Perspective</italic>. While we acknowledge the analytical value of triangular (WBT) models that include Taiwan as a strategic player, the scope of our article&#x2014;limited by both space and focus&#x2014;required us to simplify the model to highlight the asymmetric payoff structures and strategic preferences of the two major powers. This simplification should not be interpreted as a denial of Taiwan&#x2019;s agency, but rather as a choice made for clarity and coherence within a specific theoretical framework. We have now added a brief clarifying note to the manuscript acknowledging this limitation and suggesting that future research might explore the dynamics of a trilateral model incorporating Taiwan as a full actor. 
                    <bold>3. Oversimplification of Outcomes in Table 1</bold>
                </p>
                <p> We sincerely thank the reviewer for drawing attention to the oversimplification of outcome descriptions in Table 1, as well as for highlighting the underrepresentation of China&#x2019;s long-term strategic ambitions. In response, we have revised Table 1 to include more nuanced descriptions of outcomes for both the United States and China. Specifically, we have added references to potential negative externalities&#x2014;such as economic retaliation, regional destabilization, domestic backlash, and reputational costs&#x2014;that were previously omitted. 
                    <bold>4. Understatement of China&#x2019;s Strategic Ambitions</bold>
                </p>
                <p> We agree with the reviewer that the possibility of a PRC victory leading to regional hegemony constitutes a strategically significant scenario. In response, we have clarified and expanded the relevant outcome in Table 1, explicitly noting that successful unification or U.S. withdrawal could result in Chinese dominance in the Indo-Pacific. While this implication was initially embedded in the broader notions of &#x201c;Great Rejuvenation&#x201d; and &#x201c;historical prestige,&#x201d; we now recognize the need for more explicit articulation. The revised table and accompanying text now reflect this scenario more directly. 
                    <bold>5. Conceptual Inconsistency Regarding the Constitution of the Republic of China</bold>
                </p>
                <p> We thank the reviewer for identifying the apparent inconsistency in how the article refers to the Constitution of the Republic of China. To clarify, the differing interpretations noted on pages 4 and 5 are not the authors&#x2019; own positions but rather citations of public statements made by former President Tsai Ing-wen and current President Lai Ching-te. These contrasting uses of the ROC Constitution reflect the political duality inherent in Taiwan&#x2019;s domestic discourse: on the one hand, it is invoked to assert Taiwan&#x2019;s political identity and institutional continuity; on the other, it is at times referenced within the &#x201c;One China&#x201d; framework, particularly in historical or diplomatic contexts. Our intention was to highlight this ambiguity as a feature of Taiwan&#x2019;s political positioning, not to endorse any particular interpretation. 
                    <bold>6. Academic Neutrality and Framing</bold>
                </p>
                <p> We fully agree that maintaining academic neutrality is essential, especially when addressing politically sensitive topics such as cross-Strait relations. The original formulation of the sentence on page 5 (left column) was intended merely to indicate media reactions without passing judgment on the ideological content of President Lai&#x2019;s statements. However, we acknowledge that the wording may have unintentionally given the impression of downplaying the provocative nature of his rhetoric from the PRC&#x2019;s perspective. We have revised the phrasing accordingly. 
                    <bold>7. Lack of Reflexivity in the Conclusion</bold>
                </p>
                <p> We agree that the conclusion would benefit from a brief discussion of the limitations of game theory. We have accordingly expanded the conclusion to include reflections on how changing conditions (e.g., leadership turnover) might alter the structure and outcomes of the game. These limitations are also discussed within the body of the text, particularly in the section addressing model assumptions and simplifications. 
                    <bold>All factual inaccuracies and outdated references have now been corrected. The authors thank the reviewer for drawing attention to these important issues.</bold>
                </p>
            </body>
        </sub-article>
    </sub-article>
    <sub-article article-type="reviewer-report" id="report29145">
        <front-stub>
            <article-id pub-id-type="doi">10.21956/stomiedintrelat.19242.r29145</article-id>
            <title-group>
                <article-title>Reviewer response for version 1</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Zhou</surname>
                        <given-names>Wenxing</given-names>
                    </name>
                    <xref ref-type="aff" rid="r29145a1">1</xref>
                    <role>Referee</role>
                    <uri content-type="orcid">https://orcid.org/0000-0002-6590-9042</uri>
                </contrib>
                <aff id="r29145a1">
                    <label>1</label>Nanjing University, Nanjing, China</aff>
            </contrib-group>
            <author-notes>
                <fn fn-type="conflict">
                    <p>
                        <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                </fn>
            </author-notes>
            <pub-date pub-type="epub">
                <day>18</day>
                <month>7</month>
                <year>2025</year>
            </pub-date>
            <permissions>
                <copyright-statement>Copyright: &#x00a9; 2025 Zhou W</copyright-statement>
                <copyright-year>2025</copyright-year>
                <license xlink:href="https://creativecommons.org/licenses/by/4.0/">
                    <license-p>This is an open access peer review report distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
                </license>
            </permissions>
            <related-article ext-link-type="doi" id="relatedArticleReport29145" related-article-type="peer-reviewed-article" xlink:href="10.12688/stomiedintrelat.17927.1"/>
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                <custom-meta>
                    <meta-name>recommendation</meta-name>
                    <meta-value>approve-with-reservations</meta-value>
                </custom-meta>
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        </front-stub>
        <body>
            <p>
                <bold>Peer Review for 
                    <italic>Stosunki Mi&#x0119;dzynarodowe &#x2013; International Relations</italic> 2025, 5:14</bold>
            </p>
            <p> After a thorough reading of 
                <italic>The Taiwan Game: Navigating U.S.-China Tensions from a Game Theory Perspective</italic> (hereafter referred to as 
                <italic>The Taiwan Game</italic>), I recommend conditional approval (&#x201c;approved with reservations&#x201d;). In this brief review, I will first provide an overall assessment emphasizing its contributions to Taiwan Studies, then highlight key omissions that are crucial for a more comprehensive understanding of Taiwan as a flashpoint in China-U.S. relations.</p>
            <p> </p>
            <p> 
                <bold>1. Overall Assessment of the Article</bold>
            </p>
            <p> Agata Zi&#x0119;tek, Elizabeth Freund Larus, and Anna Tatarczak&#x2019;s 
                <italic>The Taiwan Game</italic> offers an innovative application of game theory to analyze whether the United States and China are more inclined toward the use of force or accommodation regarding Taiwan&#x2019;s future. The authors seek to answer three core questions: (1) what risks China is willing to take to secure Taiwan, (2) what costs they prepared to bear, and (3) whether the U.S. is willing to employ military force in Taiwan&#x2019;s defense.</p>
            <p> </p>
            <p> The article begins with an introduction that contextualizes recent cross-Taiwan Strait developments and demonstrates the applicability of game theory for explaining these dynamics. It then reviews key incidents across the Strait, emphasizing Washington&#x2019;s role as Taipei&#x2019;s security guarantor. The discussion then introduces game theory, specifically the chicken game, to interpret the strategic preferences of Beijing and Washington. The conclusion presents the authors&#x2019; main findings, notably the plausibility of a compromise that maintains the status quo&#x2014;a dynamic consistent with a &#x201c;Chicken Game&#x201d; with asymmetric stakes.</p>
            <p> </p>
            <p> The authors argue that the payoff structure reflects &#x201c;a Chicken Game with asymmetric stakes,&#x201d; where Beijing is driven by national identity and a desire for peaceful unification, while Washington prioritizes regional stability and alliance credibility. These differing priorities shape their strategic decisions, with the authors effectively illustrating how urgency and risk tolerance influence outcomes.</p>
            <p> </p>
            <p> From a Taiwan Studies perspective, I commend the adept use of the chicken game to model high-stakes brinkmanship, capturing the asymmetry between China&#x2019;s unification goal and the U.S. commitment to regional stability. The payoff rankings&#x2014;using a clear ordinal scale from 1 (worst) to 4 (best)&#x2014;are particularly helpful, providing an accessible way to understand the strategic calculus involved.</p>
            <p> </p>
            <p> 
                <bold>2. Areas for Improvement</bold>
            </p>
            <p> Despite its valuable theoretical insights and policy relevance, 
                <italic>The Taiwan Game</italic> exhibits several notable weaknesses that present opportunities for refinement, both for the authors and for future research in Taiwan Studies.</p>
            <p> </p>
            <p> The most conspicuous limitation concerns the exclusion of Taiwan as an independent actor in the model. When analyzing cross-Strait dynamics, scholars commonly employ a triangular framework&#x2014;comprising Washington, Beijing, and Taipei (the WBT model)&#x2014;to capture the strategic complexity. While it is widely acknowledged that Taipei is comparatively weaker in military capabilities, Taiwan&#x2019;s agency should not be overlooked. Taiwanese scholar Su Chi (苏起) describes Taiwan&#x2019;s role as &#x201c;a tail wagging two dogs,&#x201d; highlighting how Taipei has historically influenced regional strategic calculations. For example, the radical pro-independence campaigns under Chen Shui-bian (陈水扁) from 2000 to 2008 precipitated crises that significantly shaped cross-strait tensions. Incorporating Taiwan as a key actor&#x2014;beyond a passive recipient&#x2014;would enrich the analysis, aligning it more closely with the multifaceted reality of the Taiwan issue.</p>
            <p> </p>
            <p> The second limitation relates to the static nature of the analysis. Although the chicken game captures elements of strategic brinkmanship, it treats Beijing and Washington&#x2019;s choices as single, isolated decisions. This overlooks how repeated interactions&#x2014;such as ongoing gray-zone tactics or escalation cycles&#x2014;could dynamically alter payoffs over time. Using an iterative framework, like Grim Trigger strategies, would better account for deterrence and escalation patterns in long-term interactions across the Strait. A dynamic, rather than static, approach would thus provide a more nuanced understanding of potential outcomes.</p>
            <p> </p>
            <p> Other areas for improvement include the lack of empirical validation. The article would benefit from case studies&#x2014;such as the 1995&#x2013;96 Taiwan Strait crises or Nancy Pelosi&#x2019;s 2022 visit&#x2014;assessing whether these events align with the predictions derived from the chicken game model. Process tracing methods could strengthen causal claims and demonstrate the model&#x2019;s explanatory power in real-world situations.</p>
            <p> </p>
            <p> Furthermore, the analysis neglects key military and economic variables that are highly relevant strategically. For instance, China&#x2019;s rapidly expanding military capabilities, including its missile technology and naval forces, are crucial factors influencing military deterrence and escalation. Similarly, Taiwan&#x2019;s semiconductor industry, especially the dominance of Taiwan Semiconductor Manufacturing Company (TSMC), is vital to regional and global supply chains, impacting economic considerations in crisis scenarios. Quantifying these variables could facilitate more comprehensive cost-benefit analyses of potential invasion or blockade scenarios.</p>
            <p> </p>
            <p> The model also overlooks non-rational influences, such as domestic political factors, nationalist sentiments, or misperceptions, which can increase the risk of miscalculation. For example, the role of alliance dynamics&#x2014;particularly Japan&#x2019;s position&#x2014;merits inclusion but remains absent from the current framework.</p>
            <p> </p>
            <p> Another significant shortcoming is the lack of Chinese-language scholarship or perspectives from mainland Chinese scholars. The literature reviewed and cited predominantly originates from American strategic circles, reflecting a Western-centric bias. Incorporating diverse sources, including Chinese academia, would enrich the analysis and mitigate the effects of Western/American centralism&#x2014;enhancing both scholarly robustness and policy relevance.</p>
            <p> </p>
            <p> Lastly, some factual inaccuracies and outdated references weaken the article&#x2019;s credibility. The authors state in the abstract that &#x201c;the U.S. has declared its support for the use of military force to defend Taiwan,&#x201d; which overstresses U.S. policy. While some U.S. presidents, including Joe Biden, have made such statements publicly, these positions are often nuanced or later &#x201c;reformulated&#x201d; by administration officials. It may be more accurate to describe U.S. support as strong but not unequivocal commitment.</p>
            <p> </p>
            <p> The article also has an issue of timeliness. I noticed that
                <italic> The Taiwan Game</italic> was last updated in May 2025. But the authors mentioned the Joe Biden administration rather than the incumbent Donald Trump administration in the introduction (p.3). A much worse error is in the conclusion that the authors viewed &#x201c;the outcome of the 2024 U.S. Presidential election&#x201d; as another key factor influencing U.S. policy toward China and Taiwan (p.9) in May 2025. The article mentions in the article that the U.S. Congress in 1999 passed the Taiwan Security Enhancement Act. But the fact is that the act was only passed the House of Representatives but failed in Senate.</p>
            <p> </p>
            <p> Additionally, the article (p.4) contains &#x200b;&#x200b;two critical mistranslations of Chinese political terms
                <bold>&#x200b;</bold>&#x200b; that require immediate editorial attention. &#x201c;Democratization&#x201d; should be minzhuhua (民主化) rather than what the authors call minzuhua (民族化). And &#x201c;nativization&#x201d; should be bentuhua (本土化).</p>
            <p> </p>
            <p> Overall, 
                <italic>The Taiwan Game</italic> excels in applying game theory to a timely geopolitical issue. Its clear writing, logical organization, and interdisciplinary approach make it valuable for scholars of international relations, area studies, and policymakers alike. However, its reliance on simplified assumptions, lack of empirical validation, limited scope of variables, and factual oversights restrict its explanatory power. Addressing these shortcomings would significantly strengthen its contribution to both academic scholarship and policy discourse.</p>
            <p>Is the study design appropriate and does the work have academic merit?</p>
            <p>Yes</p>
            <p>If applicable, is the statistical analysis and its interpretation appropriate?</p>
            <p>Not applicable</p>
            <p>Is the work clearly and accurately presented and does it engage with the current literature?</p>
            <p>Partly</p>
            <p>Are the conclusions drawn adequately supported by the results?</p>
            <p>Yes</p>
            <p>Are sufficient details of methods and analysis provided to allow replication by others?</p>
            <p>Yes</p>
            <p>Are all the source data and materials underlying the results available?</p>
            <p>No source data required</p>
            <p>Reviewer Expertise:</p>
            <p>Taiwan Studies, China-U.S. relations, international relations, American Studies</p>
            <p>I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above.</p>
        </body>
        <sub-article article-type="response" id="comment3398-29145">
            <front-stub>
                <contrib-group>
                    <contrib contrib-type="author">
                        <name>
                            <surname>Zi&#x0119;tek </surname>
                            <given-names>Agata </given-names>
                        </name>
                        <aff>International Political Relations, Institute of International Relations, Lublin, Poland</aff>
                    </contrib>
                </contrib-group>
                <author-notes>
                    <fn fn-type="conflict">
                        <p>
                            <bold>Competing interests: </bold>No competing interests were disclosed.</p>
                    </fn>
                </author-notes>
                <pub-date pub-type="epub">
                    <day>28</day>
                    <month>7</month>
                    <year>2025</year>
                </pub-date>
            </front-stub>
            <body>
                <p>
                    <bold>We appreciate the reviewer&#x2019;s thoughtful observation regarding the exclusion of Taiwan as an independent strategic actor in our model. We fully acknowledge that this choice may appear analytically limiting, particularly given Taiwan&#x2019;s agency and its historical role in shaping cross-Strait dynamics. However, our primary goal in this article was to model the bilateral strategic tensions between the United States and the People&#x2019;s Republic of China, as perceived through the lens of game theory. In this context, Taiwan is treated as the central stake over which both actors compete, rather than as a third player within the game-theoretic structure. This framing is deliberate and reflected in the title of the article: 
                        <italic>The Taiwan Game: Navigating U.S.&#x2013;China Tensions from a Game Theory Perspective</italic>. While we recognize the analytical value of triangular (WBT) models that include Taiwan as a strategic player, the scope of our article&#x2014;limited by both space and focus&#x2014;required us to simplify the model to emphasize the asymmetric payoff structures and strategic preferences of the two major powers. This simplification should not be interpreted as a denial of Taiwan&#x2019;s agency, but rather as a choice made for clarity and coherence within a specific theoretical framework.</bold>
                </p>
                <p>
                    <bold> </bold>
                </p>
                <p>
                    <bold> We have now added a brief clarifying note to the manuscript acknowledging this limitation and suggesting that future research might explore the dynamics of a trilateral model that incorporates Taiwan as a full actor.</bold> 
                    <bold>We also thank the reviewer for raising important concerns about the theoretical framework and its static character. We would like to clarify that our use of game theory was analogical and intentionally tailored to the specific contours of this political analysis. While we acknowledge that dynamic modeling&#x2014;such as sequential or repeated games&#x2014;could enhance the representation of long-term interactions, our goal was to apply a simplified model that highlights the asymmetry of interests and strategic stakes between the United States and China. Despite its inherent limitations, we believe that game theory provides valuable analytical clarity and heuristic potential. Each configuration of interests develops its own internal logic, which may become partially autonomous from the intentions or actions of the players themselves.</bold>
                </p>
                <p>
                    <bold> </bold>
                </p>
                <p>
                    <bold> By design, game theory does not account for the social roots or historical evolution of political interests, nor does it explain the origin of conflicting preferences&#x2014;it presumes them in order to model strategic interaction. While we did attempt to provide contextual background for the decision-making situation, we ultimately treated the opposing interests of the U.S. and China as the foundation of the game itself. Game theory offers a formal mathematical structure, and its explanatory power depends on how effectively it addresses the guiding research questions. We hope that our application of the model has succeeded in shedding light on the strategic dilemmas at the heart of current U.S.&#x2013;China tensions over Taiwan.</bold> 
                    <bold>Another area for improvement, as noted by the reviewer, is the lack of empirical validation. This article offers an analytical model based on a Chicken Game with asymmetric stakes, providing a simplified framework to understand the complex dynamics of the Taiwan Strait. Due to space limitations, a full empirical validation of the model was not included. Future research could examine selected case studies (e.g., the 1995&#x2013;1996 Taiwan Strait Crisis or Nancy Pelosi&#x2019;s 2022 visit) to assess whether the logic of the Chicken Game adequately captures real-world decision-making.</bold>
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                    <bold> It is also possible that alternative game-theoretic models (e.g., repeated games, sequential games, or games with incomplete information) might better explain specific situations. We appreciate this suggestion, and we plan to pursue this direction in our future research.</bold> 
                    <bold>The reviewer further noted that the analysis neglects key military and economic variables that are strategically significant. We are aware of this and addressed it only partially. It is important to remember, however, that political relations almost never take the form of a strictly formalized game. As such, game theory has significant limitations in this context. One of its core assumptions is the presence of players&#x2014;meaning that for a situation to qualify as a game, there must be at least two participants, such as two states. In our analysis, we did not include Taiwan as a player, because doing so would transform the scenario from a two-player game into a multiplayer one. Of course, we recognize that it is impossible to isolate bilateral relations from the influence of the broader political environment, which&#x2014;while not formally participating in the game&#x2014;nevertheless significantly shapes it (such as the role of other actors like Taiwan). Another limitation lies in objectively determining the interests of the players and how those interests are interpreted, as this opens the door to the problem of misperception. As researchers, we are not part of the decision-making centers and do not participate in the decision-making process. The clash of interests and strategies in political games cannot be precisely defined&#x2014;they can only be inferred. In classical game theory, players also have a finite set of strategies to choose from, which inherently makes this an analysis by analogy.</bold> 
                    <bold>The reviewer rightly pointed out that the role of alliance dynamics&#x2014;particularly Japan&#x2019;s position&#x2014;deserves consideration, yet it remains absent from the current model. We are aware of the significance of various variables; however, their role is excluded in game theory, which unfortunately constitutes a weakness of applying game theory to the analysis of political situations.</bold>
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                    <bold>All inaccuracies and outdated references have been corrected. The authors thank the reviewer for drawing attention to these shortcomings.</bold>
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