1. Graduate School of Media and Governance, Shonan Fujisawa Campus, Keio University, Fujisawa 252-0882, Japan
2. Department of Business Administration, School of Political Science and Economics, Shonan Campus, Tokai University, Hiratsuka 259-1292, Japan
3. NUCB Business School, Nagoya University of Commerce and Business, Nagoya 460-0003, Japan