Charles T. Clotfelter is Z. Smith Reynolds Professor of Public Policy Studies and Professor of Economics and Law at Duke University. He is also Director of the Center for the Study of Philanthropy and Voluntarism at Duke and is a Research Associate of the National Bureau of Economic Research.

Thomas Ehrlich is Distinguished University Scholar, California State University, and Senior Scholar, Carnegie Foundation for the Advancement of Teaching. He is also President Emeritus, Indiana University; the former Provost, University of Pennsylvania; and former Dean, Stanford Law School.