拉丁美洲許多國家在第三波民主化浪潮中歷經政體轉型，在比較政治學界中為一重要的研究課題。有別於既有文獻從總體層次、或是國際層次的因素來探討政體變遷，本論文主張跨國人權非政府組織網絡對於民主轉型具有重要的促進效果。本研究以拉丁美洲18個威權體制(1969∼1995) 的資料為基礎，運用量化方法對於上述主張進行系統性的驗證。本研究的實證分析顯示，在其他條件不變的情況下，一個威權國家若有愈密集的跨國人權非政府組織動員網絡，則該國愈有可能歷經民主轉型。綜合而言，本論文的創新之處在於透過嚴謹..

The regime change of many Latin American countries under the Third Wave of democratization has been a crucial topic in the field of comparative politics. Unlike previous literature that examines how democratic transition is shaped by macro-level or international-level factors, this study argues that transnational human rights NGOs networks play a significant factor in promoting democratic transition. Using data of 18 authoritarian regimes in Latin America between 1969 and 1995, the quantitative analysis demonstrates that a higher level of t..

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..