He is the author of Retiring the State: The Politics of Pension Privatization in Latin America and Beyond (2003). His articles on economic and social policy reform, elections and party systems, and ethnic politics in Latin America have appeared in Comparative Politics, Electoral Studies, the Journal of Latin American Studies, Latin American Politics and Society, the Latin American Research Review, and World Politics. He is currently working on a book on the emergence of ethno-populism in Latin America.