Institution: | (1) CREST-ENSAE, 15, Bd Gabriel Péri, 92241 Malakoff Cedex, France and CERMSEM-Université de Paris I, France and Stern School of Business at NYU, 44 W 4th St, NY, USA , US;(2) CREST-ENSAE (e-mail: napp@ensae.fr), and Université Paris IX-Dauphine, France , FR |