'This essential volume illuminates a dark but critical component of international economic law: the international legal regulation of capital controls. This is a field of deep economic and political interest, and implicates the question of the “right to regulate,” in connection with economic policy in developing and developed countries. But the applicable law is fragmented and somewhat ambiguous, with various rules associated with various institutions. Prof. Mercurio provides a careful and persuasive analysis of the current legal situation under IMF, WTO, and preferential trade agreement law, and an essential roadmap for policy-makers as they seek to comply with, or perhaps to reform, the law. This lucid and well-documented volume also provides a valuable resource for students and scholars of international economic law.' Joel P. Trachtman, Professor of International Law and Henry J. Braker Professor of Commercial Law, The Fletcher School, Tufts University