First Author:   Dongsuk Oh Faculty of Economics, Meikai University ods@meikai.ac.jp   1 Akemi, Urayasu-shi, Chiba Urayasu, 279-8550, Japan   +81-47-355-5111 ext.1519(Phone) +81-47-355-5111 ext.1519(Fax) https://www.meikai.ac.jp Second Author: Risa Hagiwara Faculty of Economics, Meikai University hagiwara@meikai.ac.jp   Urayasu-shi, Urayasu-shi, Chiba Urayasu, 279-8550, Japan   +81-47-355-5111 ext.1419(Phone)   https://www.meikai.ac.jp