First Author:   Ming Hsin Lin Graduate School of Economics, Nagoya University linmh@soec.nagoya-u.ac.jp   Graduate School of Economics, Nagoya University, Furo-cho, Chikusa-ku,, Nagoya 464-8601, Japan Nagoya, 464-8601, Japan   +81-52-789-2374(Phone) +81-52-789-2374(Fax)