First Author:   Martin Besfamille Departamento de Economía, Universidad Torcuato Di Tella mbesfamille@utdt.edu   Saenz Valiente 1010 Ciudad Autónoma de Buenos Aires, C1428BIJ, Argentina   ++5411 5169-7308(Phone) ++5411 5169-7308(Fax) http://www.utdt.edu/~mbesfamille Second Author: Philippe De Donder Toulouse School of Economics (GREMAQ-CNRS and IDEI) dedonder@cict.fr         Third Author: Jean Marie Lozachmeur Toulouse School of Economics (GREMAQ-CNRS and IDEI) jean-marie.lozachmeur@univ-tlse1.fr   IDEI, Manufacture des Tabacs, 21 Allée de Brienne Toulouse, 31000, France   +32 561128564(Phone)