1. Paris School of Economics, 48 Boulevard Jourdan, Paris 75014, France.
2. CNRS, UMR8545, Paris-Jourdan Sciences-Economiques, 48 Boulevard Jourdan, Paris 75014, France.
3. Center for Research in Economics and Statistics (CREST), 15 Boulevard Gabriel Péri, Malakoff 92245, France., France.