Sebastien Cochinard Universite Paris 5 Rene Descartes   Universite Paris 5 Rene Descartes Faculte de Droit 10, avenue Pierre Larousse Malakoff Cedex, 92245 France   sebastien.cochinard@univ-paris5.fr             JEL Areas: C7 : Game Theory and Bargaining Theory:General H0 : Public Economics: General