First Author:   Show-lin Chen Dept. of Economics, Fu-Jen Catholic University ecos1031@mail.fju.edu.tw   New Taipe, 24205, Taiwan   +886-2-29052690(Phone) +886-2-29052690(Fax) http://www.economics.fju.edu.tw/03_teacher/Chen_Show_Lin.htm Second Author: Ching-chin Chou National Taipei University a8665171@yahoo.com.tw   5F., No.27, Jingzhong 2nd St Zhongli City, 32071, Taiwan   +886-920-866-533(Phone)