Macartan Humphreys (Ph.D., Harvard, 2003) works on the political economy of development and formal political theory. Ongoing research focuses on political inequality, post-conflict development, identity politics, and democratic development with a current focus on the use of field experiments to study democratic decision-making in post-conflict and developing areas. He has conducted field research in Chad, Ghana, Haiti, Indonesia, Liberia, Mali, Sao Tome and Principe, Sierra Leone, Senegal, Uganda, and elsewhere. Recent work has appeared in the American Political Science Review, World Politics, the Economic Journal, and elsewhere. He has authored or coauthored books on ethnic politics, natural resource management, and game theory and politics. A former Trudeau fellow and scholar of the Harvard Academy, he is a Professor of Political Science at Columbia University and Director of research on Institutions and Political Inequality at the WZB in Berlin.