Louis-joel Diendere Thomas SANKARA University   01 BP 3755 Ouagadougou 01 OUAGADOUGOU, Kadiogo 01 BP 3755 Burkina Faso   dienlouiss@gmail.com   www.uts.bf           JEL Areas: E3 : Prices, Business Fluctuations, and Cycles: General (includes Measurement and Data) F1 : Trade: General