Affiliation: | a Département de mathématiques et de statistique, Université Laval, 1045, avenue de la Médecine, Québec, Canada G1V 0A6 b Faculté des Hautes Études Commerciales (HEC), Université de Lausanne, Quartier UNIL-Dorigny, Bâtiment Extranef, 1015 Lausanne, Switzerland c Department of Applied Economics, Catholic University of Leuven, Naamsestraat 69, B-3000 Leuven, Belgium d Department of Quantitative Economics, University of Amsterdam, Roetersstraat 11, 1018 WB Amsterdam, The Netherlands e Department of Econometrics and Operations Research, Tilburg University and CentER, P.O. Box 90153, 5000 LE Tilburg, The Netherlands |