First Author:   Abdelkader Aguir Institute of Political Studies of Grenoble and Faculty of Economic and Management Sciences of Sousse aguir_a@yahoo.fr   , 6 place pasteur Résidence Galilée Grenoble, 38000, France   +33751819561(Phone) +33751819561(Fax) Second Author: Mounir Smida Faculty of Economic and Management Sciences of Sousse (Tunisia) lumineu@yahoo.fr