First Author:   Yeung-nan Shieh San Jose State University ynshieh@yahoo.com   One Washington Square, Department of Economics, San Jose State University San Jose, 95192-0114, USA   408-924-5413(Phone) 408-924-5413(Fax) Second Author: Ming-chieh Chen Jinwen University of Sience & Technology mmitchellchen@gmail.com   Department of Business Administration, Jinwen University of Science & Technology Taipei, 23152, Taiwan (ROC)   886-2-82122000ext2400(Phone) 886-2-82122411(Fax)