1. Wisconsin School of Business, University of Wisconsin-Madison, Madison, Wisconsin 53706;
2. School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin 53726;
3. Department of Industrial Engineering, Koç University, 34450 Sarıyer/İstanbul, Turkey;
4. The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania 19104;
5. Gies College of Business, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820