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 ..

本文的目的在於探討蜜月期選舉時程如何在半總統制下，對前三大政黨在國會選舉時的表現，產生不同於在總統制下所產生的影響。本文認為，由於總統制與半總統制的權力分立程度不同，所以導引出來的蜜月期選舉效應也就相異。根據既有文獻可知，在總統制下，因為權力完全分立，總統黨與第三黨在以具有比例性的選制所進行的蜜月期國會大選中會選得比較好，但本文認為這個效應無法類推到半總統制國家。在半總統制下，因為權力只有部分分立，國會大選是行政權選舉的第二階段，所以即便在蜜月期選舉時程中，..

This paper aims at exploring how semi-presidentialism differs from presidentialism in affecting electoral performance of three largest parties in honeymoon elections. This paper argues that different levels of power separation in presidentialism and semi-presidentialism explain why the effects of honeymoon elections vary. Many existent studies indicated that in presidential systems, with total power separation, the largest and the third largest parties would gain in honeymoon elections that used proportional electoral systems..