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 ..

選舉制度影響政黨體系，是廣為人知的因果推論。依此邏輯，若以政黨體系為因，以選舉制度的變化為果，即產生內生性的選制變遷理論。然而，某些研究者仍認為選制變革起於和政黨體系無關的外生因素。本文主張，選制變遷是否受到政黨體系的影響，取決於選制的種類。第一，有利大黨的多數決選制如果始終未出現一黨過半，則國會屬於多黨制，有可能因為小黨組成多數聯盟而改採比例性選制。尤其當現狀為並立式單一選區兩票制時，可能因為小黨的議席多來自政黨名單，而比代表區域主義的多數決選制更容易導致..

It is well known that electoral system shapes party system. By this logic, an endogenous explanation for changes in electoral systems should treat party system as the cause and changes as the consequence, in sharp contrast with theories attributing changes to exogenous factors that are irrelevant to party system. This paper argues that whether changes in electoral system are caused by party system depend on the type of the electoral system. First, if a majority party never emerges from a majoritarian electoral system, minor p..