Honoré Houngbedji Faculty of Economics and Management, University of Abomey Calavi, Benin   01 BP 1287 Cotonou, Bénin   hounore@yahoo.fr             JEL Areas: E3 : Prices, Business Fluctuations, and Cycles: General (includes Measurement and Data) E5 : Monetary Policy, Central Banking, and the Supply of Money and Credit: General