He is an expert on international politics and international political economy, including global governance, international monetary and financial cooperation, and regional institutions.
He was most recently Rohr Professor of Pacific International Relations and Distinguished Professor of Political Science at the School of International Relations and Pacific Studies (IR/PS) and the Political Science Department, University of California, San Diego.
He has been a Fellow at the Woodrow Wilson International Center for Scholars (2012-2013), at the Center for Advanced Study in the Behavioral Sciences at Stanford University (2007-2008), and at the Council on Foreign Relations (1994-1996 and currently).
He is a member of the Editorial Board of International Organization. His current research centers on the role of emerging economies in global governance and challenges to the nation-state as a dominant unit in the international system.
Recent publications include Integrating Regions: Asia in Comparative Context (co-editor, Stanford University Press), Politics in the New Hard Times (co-editor and contributor, Cornell University Press), and Rising Powers and Global Governance: Negotiating Change in a Resilient Status Quo, (International Affairs, 2013). He received A. B. and Ph.D. degrees from Harvard University and a B. Phil. (M. Phil.) degree from Oxford University.