First Author:   Ba Chu Carleton University ba.chu@carleton.ca   Carleton University, Dept. of Economics, C-870 Loeb Bldg. 1125 Colonel By Dr Ottawa, K1S 5B6, Canada   6135202600(Phone) 6135202600(Fax) Second Author: Shafiullah Qureshi Carleton University shafiullah.qureshi@carleton.ca   C-870 Loeb Bldg. 1125 Colonel By Dr, C-870 Loeb Bldg. 1125 Colonel By Dr Ottawa, K1S 5B6, Canada   16135202600(Phone)