Originally, economics was called political economy, and those studying it readily accepted that economic decisions are made in a political world. But economics eventually separated itself from politics to pursue rigorous methods of analyzing individual behavior and markets. Recently, an increasing number of economists have turned their attention to the old question of how politics shape economic outcomes. To date, however, this growing literature has lacked a cogent organization and a unified approach. Here, in the first full-length examination of how political forces affect economic...