The main aim of this book is to assess the importance of international rules for foreign direct investment and the major challenges to international harmonization of those rules. Particular attention is paid to the most controversial and contentious issues with the view of appraising the prospects for establishing global rules. The book is divided into three parts; the first part includes papers assessing the role of national and international legislation with further distinction being made between bilateral, regional and multilateral legal frameworks. The second part addresses regulatory issues of technology transfer, labor, environment, subsidies and investment incentives, national security, public services and sovereign wealth funds. The final part looks at the experience of some international fora in addressing these issues and at some theoretical and conceptual problems of rule harmonization. The papers have been written by legal and economic scholars from leading universities.