Todd Sandler holds the Robert R. and Katheryn A. Dockson Professorship of International Relations and Economics at the University of Southern California. He has written or edited nineteen books, including Global Collective Action, Economic Concepts for the Social Sciences, The Political Economy of NATO (with Keith Kartley) and Global Challenges: An Approach to Economic, Political, and Environmental Problems, all published by Cambridge University Press, as well as over two hundred journal articles in economics and political science. Professor Sandler's work on terrorism dates back to 1983. In 2003 he was the co-recipient (with Walter Enders) of the National Academy of Sciences Award for Behavioral Research Relevant to the Prevention of Nuclear War.