First Author:   Jong-Rong Chen Institute of Industrial Economics jrchen@cc.ncu.edu.tw   Institute of Industrial Economics, National Central University Chungli, 32001, Taiwan   +886+34227791(Phone) +886+34227791(Fax) http://140.115.85.32 Second Author: Ying-Tang Huang Institute of Industrial Economics s0444006@cc.ncu.edu.tw   Institute of Industrial Economics, National Central University Chungli, 32001, Taiwan   +886+939776733(Phone) +886+34226134(Fax) Third Author: Wen-Cheng Lu Department of Economics bunshou.lu@msa.hinet.net   Department of Economics, Aletheia University Tamsui, 25103, Taiwan   +886+928921721(Phone) +886+286318427(Fax) http://cf04.wwwts.au.edu.tw/front/bin/ptdetail.phtml?Category=102471&Part=69