Edward D. Mansfield is Hum Rosen Professor of Political Science at the University of Pennsylvania. His research focuses on international security and international political economy. He is the author of Power, Trade, and War (Princeton University Press, 1994) and the co-author (with Jack Snyder) of Electing to Fight: Why Emerging Democracies go to War (MIT Press, 2005). The recipient of the 2000 Karl W. Deutsch Award in International Relations and Peace Research, he has been a National Fellow at the Hoover Institution and his research has been supported by grants from the Harry Frank Guggenheim Foundation, the Mershon Center, and the United States Institute for Peace. He edits the University of Michigan Press Series on International Political Economy; serves on the editorial boards of the American Political Science Review, International Organization, and World Politics; and was Program Co-Chair for the 2001 annual meeting of the American Political Science Association.