First Author:   Fanny Henriet Paris School of Economics, Paris, France and Banque de France (DGEI-DEMS), Paris, France fanny.henriet@gmail.com   Banque de France, 46-2403 DGEI-DEMS-SEPS, 31, rue Croix des Petits Champs Paris Cedex 01, 75049, France   +33142924981(Phone) +33142924981(Fax)