First Author:   Lamia Soltani Higher School of Digital Economy, Manouba university, Tunisia soltanilam@gmail.com   Residence Malika, appart house I-3-4 Manouba, 2010, Tunisie   95916738(Phone) 95916738(Fax) Second Author: Aymen Frija Social Economics and policy Research program frijaaymen@yahoo.fr   Amman, 11195, Jordan       Third Author: Mohamed salah Matoussi Professor in the faculty of Economics Sciences and Management of Tunis msmat@gnet.tn