1. Department of Marketing, Kellogg School of Management, Northwestern University, Evanston, IL;
2. Department of Managerial Studies, College of Business Administration, University of Illinois at Chicago, Chicago, IL;
3. Department of Statistics and Department of Political Science, Columbia University, New York, NY;
4. Centre de Recherche en Mathématiques de la Décision (CEREMADE), Université Paris-Dauphine, Paris, France;
5. Department of Psychology, Northwestern University, Evanston, IL