1. Andrea Garnero is PhD candidate at ENS (Paris School of Economics) and SBS-EM (CEB, DULBEA [Department of Applied Economics], Université Libre de Bruxelles). Stephan Kampelmann is Postdoctoral Researcher and Lecturer at SBS-EM (CEB, DULBEA), Université Libre de Bruxelles. François Rycx is Professor of Economics at SBS-EM (CEB, DULBEA), Université Libre de Bruxelles and Research Fellow of IZA (Bonn, Germany).