Robert William Fogel is the Charles R. Walgreen Professor of American Institutions and the Director for the Center for Population Economics at the University of Chicago. Stanley L. Engerman is Professor of Economics and History at the University of Rochester.

Robert William Fogel is the Charles R. Walgreen Professor of American Institutions and the Director for the Center for Population Economics at the University of Chicago. Stanley L. Engerman is Professor of Economics and History at the University of Rochester.