States are increasingly framing their international investment agreements within larger regional arrangements. What began most prominently with the North American Free Trade Agreement in the 1990s is coming to be emulated around the globe. Over the past ten years, major regional arrangements have been adopted in Asia and Africa and more are on the way. The on-going negotiations for a Trans-Pacific Partnership Agreement, encompassing countries from Asia, North America, and South America, portend a potentially major shift in the international investment treaty landscape. Moreover, concurrent negotiations between the EU and the US for a Transatlantic Trade and Investment Partnership raise the possibility of an agreement on rules and standards between the two largest sources of foreign direct investment. This regionalization of investment treaty arrangements raises important and timely issues for policy makers, practitioners, and academics. The contributions in this volume examine the contents and character of this new generation of agreements. The book addresses the difficult questions raised by the coexistence of regional and bilateral investment treaties. In addition, it investigates the motivations behind regionalization and critically asks what regionalization tells us about the future of international investment law. (Series: Investment Treaty Law: Current Issues - Vol. 5) Subject: International Law, Investment Law, Treaty Law]