First Author:   Hikaru Ogawa Nagoya University ogawa@soec.nagoya-u.ac.jp   School of Economics, Nagoya University, Furocho, Chikusa-ku Nagoya, 464-8601, Japan   +81-52-789-2379(Phone) +81-52-789-2379(Fax) Second Author: Ming Hsin Lin Nagoya University linmh@soec.nagoya-u.ac.jp   School of Economics, Nagoya University, Furocho, Chikusa-ku Nagoya, 464-8601, Japan   +81-52-789-2374(Phone) +81-52-789-4924(Fax)