He is the author of two books, Party-System Collapse: The Roots of Crisis in Peru and Venezuela (Stanford, 2012) and Multi-Method Social Science: Combining Qualitative and Quantitative Tools (Cambridge, 2016). He has also published in Political Analysis, Sociological Methods and Research, the American Journal of Political Science, Perspectives on Politics Comparative Political Studies, among other journals and edited volumes. His research interests include causal inference, mixed-methods research designs, political parties and party systems, populism, and political representation.