First Author:   Chia-Hui Lu National Taipei University, Department of Economics chiahuilu.chlu@gmail.com   151, University Rd., San-Shia, New Taipei, 23714, Taiwan   886-2-8674-1111ext.67166(Phone) 886-2-8674-1111ext.67166(Fax) http://web.ntpu.edu.tw/~chlu/