S. M. W. Murad Bangladesh University of Business and Technology   Bangladesh University of Business and Technology Mirpur-2 Dhaka, 1216 Bangladesh   woahidmurad@ymail.com   http://www.bubt.edu.bd/profile-profileid-285-fid-25-rpid-285.tm           JEL Areas: F1 : Trade: General F0 : International Economics: General