政黨政治向來為研究憲政運作、民主深化的核心議題。過往的研究，多將政黨政治視為影響憲政與民主的自變項，但憲政特性以及民主轉型的過程，也可能系統性的影響政黨體系，對於政黨體系變遷的規模、機率，存在一定的關連性。基於此，本文以政黨體系變遷為依變數，從制度特性以及民主化背景來觀察政黨體系變遷的特性。核心假設有三：首先，就制度特性而言，直選總統的國家，比起議會內閣制的國家，政黨體系變遷的機率較高、規模較大；第二，以選舉時程而言，也是制度面向的因素，在直選總統的國家中，同時選舉或蜜月選舉，因為總統衣..

Party politics is an important issue to explain the constitutional work and consolidation of a democracy, and especially for newly democracies. If the party system would be affected by different types of constitutional systems and historical legacy, the party system should also be changed. We have three hypotheses: first, we suppose those countries with a directly elected president will have a higher probability for party system change. And the smaller parties are more likely out of parliament. Second, based on the coattail effect, countrie..

1990年統一前，東德由德國社會主義統一黨進行威權統治，西德則為一個自由民主國家，政黨在公平的競爭制度中運作。兩德統一後，政治制度迥異的兩個體系在重整過程中，必然會出現嚴重的磨合現象。不同於以往探究政黨體系僅重視體系內單純的「相關性政黨數字」的變化，與政黨「意識形態」距離與強度的差異，本論文試著從「社會分歧」(social cleavage)出發，觀察德國統一以來，社會結構分歧程度與政黨反應此基礎所呈現的互動關係，並說明政黨勢力的興衰，如何合作結盟或是分裂結構，已呈現德國政黨體系的內涵特..

Before German unification in 1990, East Germany/GDR was authoritarian-governed by the Socialist Unity Party of Germany and West Germany/FRG was a democratic state with a relatively fair competitive party system. Serious conflicts between totally different political systems must have emerged when they started to become a unified state. Differing from the traditional approach to studying party systems through party numbers and ideologies, the author will, through “social cleavage,” examine how German parties reflect the change of ..