Stanley L. Engerman is John H. Munro Professor of Economics and Professor of History at the University of Rochester. He is the author of Slavery, Emancipation, and Freedom: Comparative Perspectives (2007), Naval Blockades in Peace and War (with Lance Davis, 2007) and Finance, Intermediaries, and Economic Development (with Philip T. Hoffman, Kenneth L. Sokoloff and Jean-Laurent Rosenthal, Cambridge University Press, 2003). He is a co-editor of the three-volume Cambridge Economic History of the United States (with Robert E. Gallman) and The Cambridge World History of Slavery (with Keith Bradley,...