2014 年 2 月爆發的烏克蘭危機是歐洲當前最嚴肅的區域安全挑戰，這不僅是因為烏克蘭危機使得歐洲再度出現區域衝突情勢，同時也因列強介入而使得地緣競爭強度漸趨激烈。學界多探討烏克蘭危機及其背後的歐洲地緣競爭意涵，然較少從烏克蘭內部安全策略選擇的角度分析，本文嘗試補充此等觀點，從內部因素出發，分析烏克蘭內部政治如何影響區域危機的發生。 本文認為:第一，烏克蘭受制於強權競爭，使烏克蘭與其他中間地帶國家，都必須在左右強權互動格局下進行回應與策..

Ukraine is situated strategically between EU and Russia. The outbreak of the Euromaidan Revolution(February 2014)designates the advent of severe geopolitical competition in the European continent. Though it is crucial to understand this competition through the lens of great power rivalry, small and medium countries that exert certain leverages between great powers also warrant our attention. We argue that the domestic approach is suitable to explain the transformation of Ukraine’s security choices. We first develop an a..

由於先天即存在應然與實然的落差，加上後天多元研究取向所導致立論之分歧，使得半總統制常有評價之爭議。因此，論者在研究中除了應正確認識半總統制的理論內涵，亦需謹慎進行案例的比較或應用，始能產生更精確、細緻的研究成果。本文出於這樣的關懷，將從理論層面出發，透過相關文獻檢閱與不同研究方法之回顧，重新發現半總統制的分析焦點及不同運作類型之內涵及變遷方向。再者，本文也將進行半總統制案例的初步檢驗，以確認半總統制國家實際運作的不同樣態與其中原因。 ..

Since Maurice Duverger proposed the concept of semi-presidentialism in 1980, disputes have increasingly been raised among researchers. Given the gap between norms and operations of semi-presidentialism, as well as the complexities among the relationships of president, prime minister, and congress in the operations of semi-presidential countries, this paper develops a theory-driven comparative framework of this concept. Through re- examining the definitions of semi-presidentialism and the methodology of analyzing its operation..