Walid Gani Tunisian Competition Council   Rue du Lac Biwa, les Berges du Lac Tunis, 1053 Tunisia   walid.gani.wg@gmail.com             JEL Areas: E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data) L4 : Antitrust Issues and Policies: General