First Author:   Whelsy Boungou Paris School of Business boungouwhelsy@yahoo.com   59 Rue Nationale, Paris School of Business, 59 rue Nationale Paris, 75013, France   +33619203416(Phone) +33619203416(Fax) Second Author: Alhonita YATIE Bordeaux Sciences Economiques alhonita.yatie@u-bordeaux.fr   16 Avenue Léon Duguit, BSE, Bureau H315 Pessac, 33600, France   +33751858837(Phone)