Nasrin Afzal Researcher, Institute of Statistical Research and Training (ISRT), University of Dhaka, Bangladesh.   42/B (3C), East Ahmadnagar Paikpara, Mirpur-1 Dhaka, 1216 Bangladesh   nafzal@isrt.ac.bd             JEL Areas: C1 : Econometric and Statistical Methods: General E0 : Macroeconomics and Monetary Economics: General