Oumarou Zalle Economic Department, Norbert Zongo University   oumarouzalle@gmail.com Koudougou, Boulkiemdé 376 Burkina Faso   ozallas@yahoo.com   https://unz.bf           JEL Areas: F2 : International Factor Movements and International Business: General E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data)