!Profile of HAMAOKA,Yutaka *Professional Experience **2005-present Professor, Faculty of Business and Commerce, Keio University **2000f-2002s Visiting Scholar, Sloan School of Management, MIT **1996-2004 Associate Professor, Faculty of Business and Commerce, Keio University **1989-1992 Researcher, Management Planning Division, Nomura Research Institute, Co. Ltd. *Education **1995 Ph.D. , Graduate School of Engineering, University of Tokyo ***Thesis:"Why word-of-mouth affect Consumer's Decision Making?" [in Japanese] **1989 M. E. in Nuclear Engineering, Graduate School of Engineering, Department of Nuclear Engineering, University of Tokyo, Japan **1987 B. E.in Applied Physics, Faculty of Engineering, Tohoku University, Sendai, Japan