Masashi UMEZAWA

English   Japanese
Mailing Address:
Department of Business Economics, School of Management
Tokyo University of Science
1-11-2 Fujimi, Chiyoda-ku, Tokyo 102-0071, JAPAN
e-mail
Office: 626

Education
Ph.D., Keio University, Japan
M.S., Administrative Engineering, Keio University, Japan
B.S., Administrative Engineering, Keio University, Japan

Employment
2011-present: School of Management, Tokyo University of Science, Associate Professor, Professor.
2004-2011: Faculty of Business Administration, Daito Bunka University, Japan, Assistant Professor, Associate Professor.
2003-2004: Institute of Policy and Planning Sciences, University of Tsukuba, Japan, Research Associate ('Joshu' in Japanese).

Visiting Position
2017-2018: Dept. of Economics, Michigan State University, USA, Visiting Scholar.
2008-2009: Dept. of Economics, University of Rochester, USA, Visiting Scholar.

Research Interests
Industrial Organization (Theory), Game Theory, Microeconomics, Management Science

Grants

  • Koizumi Shinzo Memorial Scholarship, Keio University, 2000.
  • Research grant of Keio Leading-edge Laboratory of Science and Technology, 2000 – 2002.
  • Grant-in-Aid for International Conferences of Operations Research Society of Japan, 2001.
  • Grant for the Advancement of Research at the Graduate Schools of Keio University, 2002.
  • University of Tsukuba Research Fellowship, 2003.
  • Grant-in-Aid for Young Scientists (B) (19710135), The Ministry of Education, Culture, Sports, Science and Technology, Japan, (Principal Investigator) 2007 – 2009.
  • Grant-in-Aid for Scientific Research (C) (23510184), The Ministry of Education, Culture, Sports, Science and Technology, Japan, (Principal Investigator) 2011 – 2013.
  • Grant-in-Aid for Scientific Research (C) (26380320), The Ministry of Education, Culture, Sports, Science and Technology, Japan, (Principal Investigator) 2014 – 2018.
  • Grant-in-Aid for Scientific Research (C) (20K01619), The Ministry of Education, Culture, Sports, Science and Technology, Japan, (Principal Investigator) 2020 – 2024.

  • Professional Activities

  • Associate Editor: Journal of the Operations Research Society of Japan (April 2004 - March 2006, April 2012 - March 2016)

  • Membership
    Game Theory Society
    The Econometric Society
    Society for Social Choice and Welfare
    INFORMS (Institute for Operations Research and Management Sciences)
    Japanese Economic Association
    Operations Research Society of Japan

    Refereed Articles

  • Optimal two-part tariff licensing in a Stackelberg duopoly, Economics Bulletin (2023) 43, no.2, forthcoming. WP

  • Behavior-based price discrimination in a horizontally and vertically differentiated duopoly with switching costs, Information Economics and Policy (2022) 61, no.4, December, 101004. (DOI: 10.1016/j.infoecopol.2022.101004). WP Corrigendum

  • Impact of technology development costs on licensing form in a differentiated Cournot duopoly, (with T. Kitagawa and Y. Masuda), International Journal of Economic Theory (2020) 16, no. 2, June, 153-166. (DOI: 10.1111/ijet.12175). WP

  • Patent strength and optimal two-part tariff licensing with a potential rival, (with T. Kitagawa and Y. Masuda), Economics Letters (2014) 123, no.2, May, 227–231. (DOI: 10.1016/j.econlet.2014.02.011). WP

  • The replacement principle for the provision of multiple public goods on tree networks, Social Choice and Welfare (2012) 38, no.2, February, 211-235. (DOI: 10.1007/s00355-010-0526-x). WP

  • Coalitionally strategy-proof social choice correspondences and the Pareto rule, Social Choice and Welfare (2009) 33, no.1, June, 151-158. (DOI: 10.1007/s00355-008-0351-7). WP

  • Modified structural modeling method and its application -behavior analysis of passengers for East Japan Railway Company-, (with K. Nagata, M. Amagasa, and D. Cui), Industrial Engineering & Management Systems (2008) 7, no.3, December, 245-256.

  • Impossibility and possibility theorems for social choice functions on incomplete preference profiles, (with K. Ando, M. Tsurutani, and Y. Yamamoto), Pacific Journal of Optimization (2007) 3, no.1, February, 11-25. Link

  • Social welfare function for restricted individual preference domain, (with K. Ohbo, M. Tsurutani, and Y. Yamamoto), Pacific Journal of Optimization (2005) 1, no.2, May, 315-325. Link

  • Facilitating knowledge management through market mechanism, (with K. Desouza, Y. Awazu, and S. Yamakawa), Knowledge and Process Management (2005) 12, no. 2, April/June, 99–107.

  • A cost allocation problem arising in hub-spoke network systems, (with N. Matsubayashi, Y. Masuda, and H. Nishino), European Journal of Operational Research (2005) 160(3), February, 821-838. (DOI: 10.1016/j.ejor.2003.05.002).

  • A model of knowledge management through intra-firm market, (with S. Yamakawa), Journal of the Japan Society for Management Information (2004) 13, no. 1, June, 33-56 (in Japanese).

  • Evaluating all Bertrand-Nash equilibria in discrete spatial model, (with N. Matsubayashi, Y. Masuda, and H. Nishino), Journal of the Operations Research Society of Japan (2004) 47, no. 1, March, 25-37. Link

  • Sufficient conditions for nonempty core of minimum cost forest games, (with H. Nishino), Journal of the Operations Research Society of Japan (2003) 46, no.1, June, 35-43. Link

  • Merger effect of two competitive firms on network equilibrium model, (with N. Matsubayashi, Y. Masuda, and H. Nishino), European Journal of Operational Research (2002) 137(2), March, 434-447. (DOI: 10.1016/S0377-2217(01)00103-5).

  • Multi-facility location problem with nonincreasing piecewise linear demand on a tree, (with H. Nishino), Journal of the Operations Research Society of Japan (2000) 43, no. 2, June, 333-340. Link