Eric M. Patashnik is the Julis-Rabinowitz Professor of Public Policy and Political Science at Brown University. His books include Reforms at Risk (Princeton). Alan S. Gerber is the Charles C. and Dorathea S. Dilley Professor of Political Science at Yale University. His books include Field Experiments. Conor M. Dowling is associate professor of political science at the University of Mississippi. He is the coauthor of Super PAC!