The world economy has maintained or enhanced its integration in the past decade even in the face of the global financial crisis. A large part of this globalization has been driven by capital flows. This symposium focuses on one element of these capital flows, foreign direct investment (FDI), and on the regime in place to safeguard and promote such investments around the globe. The articles by Allee and Peinhardt and Simmons focus on the nature and evolution of the bilateral investment treaties (BITs) that have been developed to protect such investments and that have proliferated since the 1990s. The final article, by Büthe and Milner, turns its attention to the ways in which international trade agreements affect FDI. The comparison between the investment and trade agreements is instructive, since they seem to have different effects.

FDI has become one of the most important economic flows in the global economy. It is a critical source of capital for developing countries and remains a significant source of investment in the developed world. FDI has grown in part because countries changed their policies toward it dramatically after the 1980s; governments in developing countries made unilateral policy changes that opened up markets across the globe and increased competition among countries for FDI.