Jean-benoit Zimmermann GREQAM / Aix-Marseille University (Aix-Marseille School of Economics), CNRS and EHESS   GREQAM-EHESS 2 Rue de la Charité Marseille Cedex, 13236 France   jean-benoit.zimmermann@univ-amu.fr             JEL Areas: L2 : Firm Objectives, Organization, and Behavior: General H8 : Public Economics: Miscellaneous Issues: General