from this limitation if the restriction is warranted by a legitimate local end. The purpose of this volume is to contribute to filling the above-mentioned research gap by exploring central issues in regional economic integrations from a comparative perspective. It provides a general economic analysis of the costs and benefits of trade liberalization and the role and function of normative values in commercial policy. This is followed by a comparative analysis of the approaches used in various regional economic integrations (in North America, Europe and Latin America) and federal markets (the United States, Australia and India) regarding the balance between free trade and local public interest. Key issues in investment law, one of the most contentious elements of next-generation free trade agreements, are also addressed.