1. William R. Kerr is the Dimitri V. D’Arbeloff—MBA Class of 1955 Professor of Business Administration, Harvard Business School, Boston, Massachusetts and Research Associate, National Bureau of Economic Research, Cambridge, Massachusetts.
2. Frederic Robert-Nicoud is Professor of Economics, Geneva School of Economics and Management (GSEM), University of Geneva, Geneva, Switzerland, and Research Fellow, Centre for Economic Policy Research, London, United Kingdom.