Scott Ashworth is professor at the University of Chicago’s Harris School of Public Policy. Twitter @soashworth Christopher R. Berry is the William J. and Alicia Townsend Friedman Professor at Chicago’s Harris School of Public Policy. He is the author of Imperfect Union. Ethan Bueno de Mesquita is the Sydney Stein Professor and deputy dean at Chicago’s Harris School of Public Policy. He is the author of Political Economy for Public Policy (Princeton). Twitter @ethanbdm