1. Anthony Bald is a PhD candidate in Public Policy, Harvard University, Cambridge, Massachusetts.
2. Joseph J. Doyle Jr. is Erwin H. Schell Professor of Management and Applied Economics, MIT Sloan School of Management, Cambridge, Massachusetts. Research Associates at the National Bureau of Economic Research, Cambridge, Massachusetts.
3. Max Gross is a Researcher at Mathematica, Princeton, New Jersey.
4. Brian A. Jacob is Walter H. Annenberg Professor of Education Policy, Professor of Economics and Professor of Education at the Gerald R. Ford School of Public Policy, University of Michigan, Ann Arbor, Michigan. Research Associates at the National Bureau of Economic Research, Cambridge, Massachusetts.