First Author:   Mayumi Horie Part-time Lecturer, Osaka Univesity of Economics eb05067mh@osaka-ue.ac.jp   Room 403, 2 Iwakura-Naka-Osagi-Cho, Sakyo-Ku Kyoto, 606-0002, JAPAN   +81 75 722 8387(Phone) +81 75 722 8387(Fax)