First Author:   Hsin-Fan Chen Department of Applied Economics, National Chung-Hsing University, Taiwan d9034001@mail.nchu.edu.tw   Taichung, Taiwan       Second Author: Long-Hwa Chen Department of Applied Economics, National Chung-Hsing University, Taiwan and Department of Economics, Aarhus School of Business, University of Aarhus lowc@asb.dk   2 Silkeborgvej 7th fl. Aarhus C., 8000, Denmark   +45 29894329(Phone) +45 89486197(Fax)