About the Authors

Afifa Ferhi

Faculty of Economics and Management of Sfax, University of Sfax, Street of airport, km 4.5, LP 1088, Sfax 3018, Tunisia

Ridha Chkoundali

Faculty of Economics and Management of Sfax, University of Sfax, Street of airport, km 4.5, LP 1088, Sfax 3018, Tunisia

Corresponding Author

Email: afifaferhi2015@yahoo.fr