投資在歐盟與中國經貿關係，扮演一項重要角色。2009年12月1日《里斯本條約》生效後，歐盟共同貿易政策已涵蓋投資，使歐盟取得投資政策與投資談判之專屬職權。歐盟於2011年成為中國第一大貿易夥伴，與中國建立全面戰略夥伴關係。歐盟因此積極推動與中國的雙邊投資協定談判，以單一聲音，提高談判地位，期待簽署一項全面性投資協定。中國乃歐盟第一個對外投資協定談判之對象，歐盟又採取高標準投資保障談判策略。歐盟與中國雙邊投資協定談判除了影響歐中經貿關係之外，也將形塑國際投資規..

Investment plays a key role in EU-China trade relations. Since the Lisbon Treaty came into effect on December 1, 2009, the EU’s common commercial policy has extended to investment. Accordingly, the EU has exclusive compe- tence covering investment policy and its negotiation with third countries. Not to mention, the EU has become the main trading partner of China since 2011 because it identifies China as a strategic partner, as well as a targeting country with which to negotiate a high-standard bilateral investment agree..

本文主要的目的在於爬梳社會科學方法論中因果機制分析的發展和演進，並進一步評估政治學研究中如何運用因果機制來進行解釋以及討論相關的解釋效力的問題。本文將具體評析政治學國際關係領域中民主和平論之論點，以此來衡量政治學運用因果機制解釋的優勢和侷限。因果機制研究層面上，本文聚焦在機制的定義和類型、機制的觀察性、因果機制與因果關係、法則和中介變數的差異、機制的層次、機制的運作和測量、機制的路徑圖。因果機制運用層面上，本文側重於民主和平論的源起和演進、 民主和平論的重要論述、對於民主和平論的挑戰以及..

The main purpose of this paper is to parse out the development and evolution of causal mechanism and to further evaluate how political research adopts the method of causal mechanism to explain and discuss the explanatory effect in the field of qualitative methods. Our focus is to shed light on the causal mechanism of democratic peace theory in the field of international relations and to gauge its advantages and restraints. On the dimension of causal mechanism, this paper focuses on the definition of mechanism, observation of causal mechanis..