半總統制是新興民主國家廣為採用的政府制度類型，而現有關於半總統制的研究不論是著重憲法規範或實證行為面向，對於總統常態性的政策權限設計和相關的決策機關配置的系統性探討較為欠缺。本文試圖藉由包括臺灣在內共 21 個半總統制民主國家憲法設計的探索，讓半總統制的研究和理論能觸及總統常態性的治理課題，是半總統制研究中的新嘗試。本文焦點在於系統性解析多個國家憲法中總統的政策權與決策機關之設計模式，並進一步探討其與半總統制憲法上的次類型和實際的運作類型之關係。藉由多國案例的分析，本文呈現了重要而豐富的研究發現。研究核心發現在於，當總統具有特定政策權限時，憲法也大都配置政策諮詢或決策機制，而總統是否具主持內閣會議(或部長會議)權限，並與半總統制之憲法類型和實務類型都有一定的關聯性，因此，從「誰主持內閣會議」這個問題切入，可以相當程度辨識出該國憲法設計之原意，是讓其半總統制的行政權中樞傾向在總統或總理身上。最後，本文也對臺灣的相關憲法設計，提出了延伸的討論和思考。
Semi-presidentialism has been a popular form of government in emerging democracies. However, systematic analyses on the presidents’ powers in policy-making or on the related mechanisms of their decision- making process have been scarce. To fill in the gap in the field, this article surveys the experiences of 21 democratic countries. With a focus on constitutional design of president’s powers in policy and decision-making mechanisms, this article also tries to discover their relationship with sub- types of semi-presidentialism. The results showed that the president’s power is crucial to political accountability of the government. When a country’s constitution does not explicitly give powers of policy making to its president, its constitutional system seems to fall into a type of premier-presidential. Finally, this article reflects some opportunities and challenges for constitutional design in Taiwan.
法國第五共和體制向為半總統制的主要原型典範，並為穩定半總統制的代表，但法國各界對此一制度設計一直有著許多爭論與修改意見。2007 年法國總統大選前，各主要政黨候選人紛紛提出「第六共和」(la VIe République)的憲政倡議。法國新任總統薩科奇(Nicolas Sarkozy)於 2008 年進行自 1958 年第五共和以來最大規模的一次修憲。修憲主要方向同時強化總統與國會的權力，在總統權力部分修憲後強化總統的國會咨文權，形同間接賦予總統的行政優勢..
The French Fifth Republic (la Ve République) is not only the prototype of semi-presidentialism but also the typical model of “stable semi- presidentialism,” of which the French political circle and academia have never stopped their criticism over the design of the French Fifth Republic and have consistently expressed their opinions of modification. Even before the 2007 French presidential election, most of the major parties simultaneously advocated a new constitutional engineering plans of “la VIe Républiq..
本文檢視全世界民主國家在不同總統與國會選制的搭配組合下，政黨體系有何不同。本文發現，就國會選制而言，國會選舉採比例代表制的國家， 其國會有效政黨數在整體上明顯多於國會選舉採單一選區相對多數制的國家;而不論是國會選舉採比例代表制或是採單一選區相對多數制的國家，有總統直選制度之國家的國會有效政黨數，明顯少於無總統直選制度的國家。 進一步言，在國會選舉採比例代表制的國家中，若總統選舉採相對多數制，其國會有效政黨數會少於總統選舉採兩輪決選制的國家;不過，在國會選舉採..
This study comprehensively observes the party system under different collocations of presidential and parliamentary electoral system in democracies all over the world. Regarding parliamentary electoral system, it is found that the effective number of parliamentary parties in the countries adopting proportional representation system(PR), overall, is apparently larger than that in countries adopting plurality with single-member-district system(SMD), and that in countries holding direct presidential elections is clearly smaller ..
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