1. Department of Economics and Economic History, Universitat Autònoma de Barcelona, Edifici B–Campus de Bellaterra 08193 Bellaterra, Cerdanyola del Vallès, Spain.
2. Marshall School of Business, University of Southern California, 3670 Trousdale Parkway, Los Angeles, CA 90089.
3. Department of Economics, University of Pennsylvania, 3718 Locust Walk, Philadelphia, PA 19104.