Steven Levitsky is Professor of Government at Harvard University. His research interests include political parties, political regimes, and informal institutions, with a focus on Latin America. Professor Levitsky is author of Transforming Labor-Based Parties in Latin America: Argentine Peronism in Comparative Perspective (2003) and co-editor of Argentine Democracy: The Politics of Institutional Weakness (2005) and Informal Institutions and Democracy: Lessons from Latin America (2006), and he is currently co-editing a volume on the rise of the Left in Latin America in the 2000s. He has published articles in the Annual Review of Political Science, Comparative Political Studies, Comparative Politics, the Journal of Democracy, the Journal of Latin American Studies, Latin American Politics and Society, the Latin American Research Review, Party Politics, Perspectives on Politics, Studies in Comparative International Development, and World Politics. He is on the editorial board of the Journal of Democracy.