**Author details**

Sourour Hamza1 \* and Anis Jarboui<sup>2</sup>

1 University of Economics and Management of Sfax, University of Sfax, Tunisia

2 Higher Institute of Business Administration of Sfax, University of Sfax, Tunisia

\*Address all correspondence to: sourourmail@yahoo.fr

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
