First Author:   Fengye Sun Waseda University fengyes@akane.waseda.jp   Waseda University, Graduate School of Economics, Nishi-waseda 1-6-1 Shinjuku-ku, 169-8050, Japan       Second Author: Atsuko Ueda Waseda University aueda@waseda.jp   Waseda University, Pol Sci & Econ, Nishi-waseda 1-6-1 Shinjuku-ku, 169-8050, Japan   +81-3-3204-9189(Phone) +81-3-3204-9189(Fax)