Hugh Rockoff is a professor of economics at Rutgers University and has done extensive work in U.S. monetary history. He joins the show to discuss the criteria for an ideal monetary union and argues that the U.S. didn’t really become an optimal currency area until the 1930s. David and Hugh then discuss whether a present-day example, the Eurozone, fits these criteria. They also talk about interesting chapters in U.S. monetary history, including the Civil War, the Free Banking Era, and the bimetallism debate of the late 1800s.