Shek-wai Hui The University of Winnipeg   Depart. of Economics, University of Winnipeg 515 Portage Avenue Winnipeg, Manitoba R3B 2E9 Canada   s.hui@uwinnipeg.ca   http://io.uwinnipeg.ca/~shui1/       Primary Research Focus: Labour Economics, Economics of Education, Applied Econometrics, Evaluation of Social Program.   JEL Areas: C1 : Econometric and Statistical Methods: General J0 : Labor and Demographic Economics: General