[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