First Author:   Chrysost Bangaké University of Artois, Lille Economie et Management (LEM), Arras, F-62000, France chrysost.bangake@univ-artois.fr   Arras, 62223, France       Second Author: Désiré Avom University of Yaoundé 2 (Soa), CEREG davom99@gmail.com   Independence square Yaoundé, 1365, Yaoundé (Cameroon), Cameroun       Third Author: Hermann Ndoya University of Dschang, Laboratoire de Recherche en Economie Fondamentale et Appliquée (LAREFA) hermannondoya@gmail.com   Dschang, Cameroon