Affiliation: | 1. Institute for Economic Theory II, Humboldt-Universität zu Berlin, Spandauerstraße 1, 10178 Berlin, Germany;2. EPEE, TEPP, University of Evry-Val-d’Essonne, Bd, François Mitterand, 91025 Evry Cedex, France;3. CREST, PSE, 15 Boulevard Gabriel Peri, 92245 Malakoff Cedex, France |