Guivis Nkemgha University of Cape Town   guivis.nkemgha@uct.ac.za guivis.nkemgha@uct.ac.za guivis.nkemgha@uct.ac.za , Cameroon   guivis.nkemgha@uct.ac.za             JEL Areas: E : Macroeconomics and Monetary Economics O : Economic Development, Technological Change, and Growth