First Author:   Leonard F.S. Wang Department of Applied Economics, National University of Kaohsiung lfswang@nuk.edu.tw   No.700, Kaohsiung University Road, Nan-Tzu District Kaohsiung, 811, R.O.C.   886-7-5919322(Phone) 886-7-5919322(Fax) Second Author: Tai-Liang Chen Institute of Economics and Management, National University of Kaohsiung m0953601@mail.nuk.edu.tw   No.700, Kaohsiung University Road, Nan-Tzu District Kaohsiung, 811, R.O.C.   886-7-5919340(Phone) 886-7-5919342(Fax) Third Author: Ya-Chin Wang Department of Finance and Banking, Kun Shan University wyc@mail.ksu.edu.tw   No. 494, Da Wan Rd., Yung-Kang City Tainan Hsien, 71003, R.O.C.   886-6-2727175(Phone) 886-6-2050622(Fax)