Robert Smith is a Professor of Economics at Cornell University. He has been honored for his teaching by receiving Cornell’s highest university-wide award: the Stephen H. Weiss Presidential Fellowship ＂for effective, inspiring and distinguished teaching of undergraduate students and for outstanding contributions to undergraduate education.＂Ronald G. Ehrenberg is the Irving M. Ives Professor of Industrial and Labor Relations and Economics at Cornell University, USA.Kevin F. Hallock is Dean of the Cornell SC Johnson College of Business, Joseph R. Rich ’80 Professor of Economics and Human Resource Studies, and Director of the Institute for Compensation Studies at Cornell University. He earned a Ph.D. in Economics from Princeton University.