法國與臺灣的政府體制都屬於半總統制，法國的憲政經驗中曾出現過三次的「左右共治」，臺灣的憲政經驗中卻從未出現過「藍綠共治」，何以如此?這是本文欲探討的課題。本文藉助賽局理論作為分析工具，探討制度安排如何影響行動者間的策略互動，以致最後產生了共治與否的差異。法國與臺灣擁有不同的選舉制度和不同的國會保障機制，在兩種制度因素的交互作用下，會引導分屬不同政黨陣營的總統和國會多數產生不同的政治計算與策略互動，最終導致法國出現「左右共治」，臺灣卻沒有出現「藍綠共治」。 ..

Both France and Taiwan’s political systems are semi-presidential. However, “cohabitation” in French constitutional experience has occurred three times while Taiwan has never seen “cohabitation” until now. Finding the reason for this difference is the central question of this paper. By using the game theory as an analysis tool, the paper explores how the institutional design influences the actors’ strategic interactions, which underlies the discrepancy between France and Taiwan in “coh..

本文基於一國憲政體制類型會影響政府在COVID-19疫情時運作的方式，嘗試探討台灣半總統制政府如何回應疫情。研究焦點放在中央政府層次，探討總統、行政院院長、疫情指揮中心（指揮官）以及國會等部門的運作，並考量一致性政府和總統兼黨主席等因素的影響。研究發現，在總統權力優勢的半總統制下，蔡英文總統在處理疫情上的角色是多重的，藉由總統和黨主席雙重身份，她既是主要政策決定者，也同時介入政策執行的督導和措施的指示。相對而言，行政院院長暨其領導的相關部會仍是因應疫情的行政主體，不過因疫情指揮中心和指揮..

Based on the fact that the type of government system will affect the way the government operates during the COVID-19 epidemic, this article attempts to explore how Taiwan’s semi-presidential government handled the epidemic. The focus of the study is on the central government level, exploring the operations of the president, the president of the Executive Yuan, the epidemic command center (commander), and Congress, and considering the impact of factors such as unified government and the fact that the president is the chairman of a poli..