傳統的研究智慧中，總統制和兩黨制的配套被認為是一個民主國家較容易運作的組合。主要的理由是兩黨制較不可能出現意識形態的極化，以及因為兩個政黨需要贏得中間位置的選票，其可以促成政黨之間較溫和及向心的競爭，因而有助於總統制的運作。然而，近年來，一些兩黨總統制國家發生嚴重的憲政危機，甚至促成民主衰退。為何這些兩黨總統制國家會走上民主衰退的道路，是本文所要探索的研究問題。首先，本文透過對於拉丁美洲兩黨總統制國家的個案分析發現，憲政結構的因素如總統和國會的權力抗衡會影響..

Past research argues that presidentialism and two-party systems are workable combinations that can facilitate democratic stability. The causal mechanisms are that ideological polarization is less possible to appear in a two-party system, that two parties needing to win votes from the center encourages moderation, and that the absence of the extremist parties and the centripetal nature of party competition favor democratic stability. However, in recent years, some presidential countries with a two-party system in Latin America..

半總統制的設計，通常有一民選的總統及民選產生的國會;在此體制下，由於總統與國會雙元選舉的實施，國會理論上比一般單元選舉的內閣制 要有更強的監督制衡力量。但這種體制下的國會是否具備優於內閣制的監督能量，則在文獻上甚少探討，也成為本研究的最初動機。本文試著比較兩個半總統制的國家-臺灣與法國，並從較傳統的制度面切入，來探究兩國在制度設計安排上，賦予國會的監督潛能為何。這裡的制度設計安排，主要包括憲法及相關法規中賦予國會、委員會及個別議員的權力和資源配備;以及目前國..

The so-called semi-presidentialism designs a system that popularly elects both the president and the parliament. Under the dual-election design, the parliament theoretically should own more check and balance power than a parliament that gives rise to the cabinet. However, whether the parliament under semi-presidentialism in practice is indeed equipped with more oversight capacity than that of a cabinet system’s parliament has been rarely studied in prior literature. This paper tries to study this theoretically inte..

現今半總統制國家數目已經正式超越純粹總統制與內閣制，成為當今最多國家採用的政體類型。近來部分研究關注於半總統制國家的演化發展，除探討半總統制國家朝向內閣制傾斜的演化趨勢外，半總統制國家朝向「總統化」(presidentialisation)發展現象也成為學界關心的新研究焦點。本研究嘗試從半總統制國家朝向總統化發展的角度，探討總統化的定義內涵與演化動力、總統化對於政黨體系的影響，特別著重於總統化對於內閣性質以及內閣穩定度(stability of cabine..

The semi-presidential system has become the most popular regime type in the world, indicated by the number of states that adopted the system having surpassed that of purely presidential system and the parliamentary system since 2000. A number of major studies have recently focused on the evolution of semi-presidentialism; some of the researches have sketched the working mode of parlimentalization of semi-presidential system, and considerable studies have been paying attentions to the development of a semi-presidential system ..

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..

由於先天即存在應然與實然的落差，加上後天多元研究取向所導致立論之分歧，使得半總統制常有評價之爭議。因此，論者在研究中除了應正確認識半總統制的理論內涵，亦需謹慎進行案例的比較或應用，始能產生更精確、細緻的研究成果。本文出於這樣的關懷，將從理論層面出發，透過相關文獻檢閱與不同研究方法之回顧，重新發現半總統制的分析焦點及不同運作類型之內涵及變遷方向。再者，本文也將進行半總統制案例的初步檢驗，以確認半總統制國家實際運作的不同樣態與其中原因。 ..

Since Maurice Duverger proposed the concept of semi-presidentialism in 1980, disputes have increasingly been raised among researchers. Given the gap between norms and operations of semi-presidentialism, as well as the complexities among the relationships of president, prime minister, and congress in the operations of semi-presidential countries, this paper develops a theory-driven comparative framework of this concept. Through re- examining the definitions of semi-presidentialism and the methodology of analyzing its operation..