1. HEC Lausanne and Swiss Finance Institute, Internef 523, University of Lausanne, 1015 Lausanne, Switzerland (email: )
2. Internef 522, University of Lausanne, 1015 Lausanne, Switzerland (email: )
3. Aix-Marseille University, Centrale Marseille, IRD, AMSE, Marseille, France, 5 Boulevard Bourdet, 13001, CNRS, and EHESS (email: )