Daisuke Oyama Graduate School of Economics, Hitotsubashi University, and Paris School of Economics   Graduate School of Economics Hitotsubashi University Naka 2-1 Kunitachi, Tokyo 186-8601 Japan   oyama@econ.hit-u.ac.jp   http://www.econ.hit-u.ac.jp/~oyama/   Biographical Sketch: Ph.D., Graduate School of Economics, University of Tokyo (2003); JSPS Research Fellow at University of Tokyo (2003-2006); Lecturer at Hitotsubashi University (2006-).   Primary Research Focus: Game theory, Economic theory   JEL Areas: C7 : Game Theory and Bargaining Theory:General C0 : Mathematical and Quantitative Methods: General