First Author:   Mehdi Ben Slimane Université de Carthage, UR14ES13 MASE-ESSAIT and Université de Tunis, WTO Chair at TBS, Tunisia. benslimane.mehdi87@gmail.com         Second Author: Leila Baghdadi Université de Tunis, Tunis Business School, BADEM Lab, WTO Chair at Tunis Business School, Tunisia. leilabaghdadi@gmail.com