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Title: 三政黨的合作與競爭之賽局分析
Three-Party Game of Cooperation and Competition in Political Elections
Authors: 陳虹羽
Chen, Hong-Yu
Contributors: 王智賢
Wang, Jue-Shyan
Chen, Hong-Yu
Keywords: 政黨合作
party cooperation
party competition
subgame perfect equilibrium
sequential equilibrium
Date: 2021
Issue Date: 2021-07-01 20:30:27 (UTC+8)
Abstract: 觀察臺灣近代選舉過程中,政黨間常協商共同合作的可能性,經雙方協調後各政黨可選擇合作與否。本文建立三政黨賽局模型,分析單一席次選舉中,相對小黨在何種條件下願意與實力較強的大黨合作競選,並討論各黨決策的合理性。根據均衡結果得出,只有當滿足一定的合作利益條件時,才會產生政黨合作情形,合作對象亦不局限於實力最強的政黨。另外在資訊不對稱情況下,存在一組分離均衡,其中強者(s)型與弱者(w)型態大黨的政黨實力差距愈大時,小黨愈容易與w型態的大黨合作競選,此外,若小黨無競選成本時,將不會有政黨合作之現象。
Observing the process of the recent elections in Taiwan, we find different political parties often negotiated with each other for the possibility of cooperation. Each party would decide whether to cooperate or not. This paper develops a three-party game theoretical model of single-seat elections to analyze the conditions that minor political party would agree to cooperate with major political parties, and discusses the rationality of decision from each political party. According to the equilibrium results, the cooperation between political parties only occur when certain conditions are met. The cooperative partner is not restricted to the most powerful party. In addition, there is a separating equilibrium in the case of asymmetric information. This leads to conclusion that the larger difference between the strong type and the weak type of major political party is, the more common minor political party would cooperate with the weak type of major political party. Moreover, there exists no cooperation when the minor political party has zero cost in political elections.
Reference: I. 中文部分
局分析〉,《臺灣政治學刊》,9(1): 3-37。
提名人選為範例〉,《選舉評論》,9: 49-82。
立臺灣大學政治學系碩士學位論文,9(1): 3-37。
舉研究,15(2): 37-66。
立臺灣大學國家發展學系碩士學位論文,9(1): 3-37。

II. 英文部分
Best, R. E. and S. B. Lem. 2010.“Electoral Volatility, Competition and Third-Party Candidacies in US Gubernatorial Elections.” Party Politics 17(5) 611-628.
Chisik, Richard A., and Robert J. Lemke. 2006.“When winning is the only thing: pure strategy Nash equilibria in a three-candidate spatial voting model.” Social Choice and Welfare 26(1):209-215.
Cross, William. 2008. “Democratic Norms and Party Candidate Selection: Taking Contextual Factors into Account.” Party Politics 14(5):596-619.
Kreps, David M., and Robert Wilson. 1982.“Sequential Equilibria.” Econometrica 50(4):863-894.
Moore, John, and Rafael Repullo. 1988.“Subgame Perfect Implementation.” Econometrica 56(5):1191-1220.
Scarrow, Howard A.. 1986.“Duverger's Law, Fusion, and the Decline of American "Third" Parties.” The Western Political Quarterly 39(4):634-647.
Description: 碩士
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Data Type: thesis
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