Takuya Sekiguchi Tokyo Institute of Technology   Department of Value and Decision Science Tokyo Institute of Technology 2-12-1, O-okayama Meguro-ku, Tokyo 152-8552 Japan   sekiguchi.t.ag@m.titech.ac.jp     Biographical Sketch: Ph.D student in Tokyo Institute of Technology   Primary Research Focus: Evolutionary dynamics of social norms, evolutionary game theory, computer simulation   JEL Areas: D7 : Analysis of Collective Decision-Making: General C3 : Multiple or Simultaneous Equation Models: General