Macartan Humphreys works on the political economy of development and formal political theory. Ongoing research focuses on civil wars, post-conflict development, ethnic politics, natural resource management, political authority and leadership, and democratic development. He uses a variety of methods including survey work, lab experimentation, field experimentation, econometric analysis, game theoretic analysis, and classical qualitative methods. He has conducted field research in Chad, Ghana, Haiti, Indonesia, Liberia, Mali, Sao Tome and Principe, Sierra Leone, Senegal, Uganda, and elsewhere. A new series of projects underway uses field experiments to examine democratic decision-making in post-conflict and developing areas. Recent research has appeared in the American Political Science Review, World Politics, Public choice, the Journal of Conflict Resolution, and elsewhere. He is a research scholar at the Center for Globalization and Sustainable Development at Columbia University’s Earth Institute.