1. Cecilia Yen Koo Professor of Decision Sciences and Public Policy and Co-director of the Center for Risk Management and Decision Processes, The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania; Research Associate, National Bureau of Economic Research, Cambridge, Massachusetts.
2. Research Fellow at the Center for Risk Management, The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania, and Research Associate, Laboratoire d'économétrie, Ecole Polytechnique, Paris, France.