[1] Univ Lausanne, HEC Lausanne, Internef 523, CH-1015 Lausanne, Switzerland
[2] Univ Lausanne, Swiss Finance Inst, Internef 523, CH-1015 Lausanne, Switzerland
[3] Univ Lausanne, Internef 522, CH-1015 Lausanne, Switzerland
[4] Aix Marseille Univ, Cent Marseille, IRD, AMSE, Marseille, France
[5] CNRS, 5 Blvd Bourdet, F-13001 Marseille, France
[6] EHESS, Paris, France