Dongryul Lee Department of Economics, Sungshin University   1023 Sujeong Bldg. B 2 Bomun-ro 34da-gil Seongbuk-gu Seoul, 02844 Republic of Korea   dongryul78@gmail.com             JEL Areas: C7 : Game Theory and Bargaining Theory:General D7 : Analysis of Collective Decision-Making: General