Sherif Gamal Salem American University in Cairo and The British University in Egypt.   89 B, Helwan El Zeraee road, Maadi Cairo, 89 B Egypt   gamalsalem.sherif@gmail.com   https://sites.google.com/site/sherifgamalsalem/           JEL Areas: C7 : Game Theory and Bargaining Theory:General D6 : Welfare Economics: General