Institution: | 1.Paris School of Economics,University Paris 1 Panthéon-Sorbonne,Paris,France;2.Centre de la Vieille Charité,GREQAM-CNRS,Marseille Cedex 02,France;3.Department of Economics and Finance,University of Wyoming,Laramie,USA;4.GATE L-SE UMR 5824,Univ Lyon, Université Lumière Lyon 2,Ecully,France |