Updated on 2022/11/29

写真a

 
YAMAZAKI Takeshi
 
Organization
Academic Assembly Institute of Humanities and Social Sciences KEIZAIGAKU KEIRETU Professor
Faculty of Economics Department of Economics Professor
Graduate School of Modern Society and Culture Multisocial Studies Professor
Faculty of Economic Sciences Professor
Title
Professor
External link

Degree

  • 博士(経済学) (Ph.D. in Economics) ( 2000.6   ニューヨーク州立大学バッファロー校 (アメリカ合衆国) )

Research Areas

  • Humanities & Social Sciences / Economic theory

  • Humanities & Social Sciences / Economic policy

  • Humanities & Social Sciences / Economic policy

  • Humanities & Social Sciences / Public economics and labor economics

Research History (researchmap)

  • Niigata University   Department of Economics   Professor

    2014.3

      More details

  • Niigata University   Department of Economics   Associate Professor

    2002.4 - 2014.2

      More details

  • Gifu Shotoku Gakuen University   Department of Economics and Information Studies   Associate Professor (as old post name)

    1998.4 - 2002.3

      More details

Research History

  • Niigata University   Graduate School of Modern Society and Culture Multisocial Studies   Professor

    2014.3

  • Niigata University   Graduate School of Modern Society and Culture Economics and Management   Professor

    2014.3

  • Niigata University   Faculty of Economics Department of Economics   Professor

    2014.3

  • Niigata University   Graduate School of Modern Society and Culture Multisocial Studies   Associate Professor

    2012.4 - 2014.2

  • Niigata University   Graduate School of Modern Society and Culture Economics and Management   Associate Professor

    2012.4 - 2014.2

  • Niigata University   Faculty of Economics Department of Economics   Associate Professor

    2007.4 - 2014.2

  • Niigata University   Faculty of Economics Department of Economics   Associate Professor (as old post name)

    2002.4 - 2007.3

▶ display all

Education

  • State University of New York at Buffalo   Department of Economics   Ph.D. Program

    1995.9 - 2000.6

      More details

Professional Memberships

 

Papers

  • Existence of Unique Equilibrium in Cournot Mixed Oligopoly Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    International Game Theory Review   20 ( 3 )   2018.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    researchmap

  • On the Unique Existence of Nash Equilibrium in Cournot Mixed Oligopoly with Linear Demand and Quadratic Cost Functions

    Takeshi Yamazaki

    The Journal of Economics, Niigata University   102   51 - 61   2017.3

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    researchmap

  • On the Nash Equilibrium of Asymmetric Public-Good Contests Reviewed

    Takeshi Yamazaki

    in Pierre von Mouche and Federico Quartieri (eds), Equilibrium Theory for Cournot Oligopolies and Related Games: Essays in Honour of Koji Okuguchi, Springer Series in Game Theory   269 - 279   2016.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    researchmap

  • Heterogeneity and Number of Players in Rent-Seeking, Innovation, and Patent-Race Games Reviewed

    Noriaki Matsushima, Takeshi Yamazaki

    in Pierre von Mouche and Federico Quartieri (eds), Equilibrium Theory for Cournot Oligopolies and Related Games: Essays in Honour of Koji Okuguchi, Springer Series in Game Theory   281 - 294   2016.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    researchmap

  • SUFFICIENT AND NECESSARY CONDITIONS FOR EQUILIBRIUM UNIQUENESS IN AGGREGATIVE GAMES Reviewed

    Pierre von Mouche, Takeshi Yamazaki

    JOURNAL OF NONLINEAR AND CONVEX ANALYSIS   16 ( 2 )   353 - 364   2015

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:YOKOHAMA PUBL  

    Sufficient and necessary conditions for an aggregative game to have a unique Nash equilibrium are identified. In particular, an improvement of a result of Gaudet and Salant (1991) for Cournot oligopolies is obtained. The results are proved by exploiting the general relation between Nash equilibria and fixed points of the (virtual) aggregate cumulative best reply correspondence.

    Web of Science

    researchmap

  • Global stability of Nash equilibrium in aggregative games Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    International Game Theory Review   16 ( 4 )   2014.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:World Scientific Publishing Co. Pte Ltd  

    If an aggregative game satisfies the generalized Hahn conditions, then there exists a unique Nash equilibrium which may not be interior and is globally asymptotically stable under two alternative continuous adjustment processes with non-negativity constraints.

    DOI: 10.1142/S0219198914500145

    Scopus

    researchmap

  • On the Unique Existence of Nash Equilibrium in Smooth Asymmetric Contests

    Takeshi Yamazaki

    The Journal of Economics, Niigata University   95   99 - 115   2013.9

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    researchmap

  • Group-Size Effects on the Endogenous Tariff

    Takeshi Yamazaki

    The Journal of Economics, Niigata University   93   53 - 73   2012.9

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    researchmap

  • On the Existence and uniqueness of Pure-Strategy Nash Equilibrium in Rent-Seeking Games with Risk-Averse Players : A Cumulative-Best-Reply Approach

    Takeshi Yamazaki

    The Journal of Economics, Niigata University   88 ( 88 )   51 - 66   2010.3

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    CiNii Article

    CiNii Books

    researchmap

    Other Link: http://hdl.handle.net/10191/12631

  • The uniqueness of pure-strategy Nash equilibrium in rent-seeking games with risk-averse players Reviewed

    Takeshi Yamazaki

    PUBLIC CHOICE   139 ( 3-4 )   335 - 342   2009.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

    This article proves that if each player's measure of absolute risk aversion is nonincreasing in his/her wealth, then there exists a unique pure-strategy Nash equilibrium in the general rent-seeking game, where risk-averse players can coexist with risk-neutral players, attitude toward risk can differ among players, and concave production functions for lotteries are not necessarily the same among players.

    DOI: 10.1007/s11127-009-9396-0

    Web of Science

    researchmap

  • Global stability of unique Nash equilibrium in Cournot oligopoly and rent-seeking game Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    JOURNAL OF ECONOMIC DYNAMICS & CONTROL   32 ( 4 )   1204 - 1211   2008.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    A sufficient condition is derived for the global stability of a unique interior Nash equilibrium in an aggregative game. The condition is applied to investigate the global stability of the Nash - Cournot equilibrium in Cournot oligopoly without product differentiation and that of the Nash equilibrium in rent-seeking games. (c) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jedc.2007.05.003

    Web of Science

    researchmap

  • On the existence and uniqueness of pure-strategy nash equilibrium in asymmetric rent-seeking contests Reviewed

    Takeshi Yamazaki

    JOURNAL OF PUBLIC ECONOMIC THEORY   10 ( 2 )   317 - 327   2008.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:BLACKWELL PUBLISHING  

    There can be three types of heterogeneity among players in a rent-seeking contest. First, effectiveness of player's effort on the winning probabilities may differ among players. Secondly, players may evaluate the rent or prize of the rent-seeking contest differently. Thirdly, players may face different financial constraints. This article proves under standard assumptions in the literature that there exists a unique pure-strategy Nash equilibrium in a general asymmetric rent-seeking contest with these three types of heterogeneity among players.

    DOI: 10.1111/j.1467-9779.2008.00364.x

    Web of Science

    researchmap

  • Optimal Subsidies in a Two-Mode Model

    Takeshi Yamazaki

    The Journal of Economics, Niigata University   84 ( 84 )   85 - 104   2008.3

     More details

    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    CiNii Article

    CiNii Books

    researchmap

    Other Link: http://hdl.handle.net/10191/6630

  • Stability of equilibrium in Bertrand and Cournot duopolies Invited Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    International Game Theory Review   6 ( 3 )   381 - 390   2004.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    We analyze the global stability of the equilibria in Bertrand and Cournot duopolies. Assuming a set of sufficient conditions for the global stability of the Bertrand duopoly equilibrium, we derive additional conditions which are sufficient for the global stability of the Cournot duopoly equilibrium. We use the relationships among the first and second order partial derivatives of the ordinary and inverse demand functions in deriving our results.

    DOI: 10.1142/S0219198904000265

    Scopus

    researchmap

  • Tarriff rate as a public good Reviewed

    Takeshi Yamazaki

    Review of International Economics   12 ( 1 )   95 - 107   2004.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    If domestic firms lobby for protection, the tariff rate is a public good to all domestic firms, whether they engage in lobbying or not. This paper analyzes how the endogenous tariff rate as a public good depends on the group size in two-stage lobbying models. The result depends not only on whether domestic firms lobby cooperatively or not, but also on whether domestic firms incur indirect lobbying costs or not. This paper shows that if free riding is not very serious and if the number of domestic firms is small compared to the number of foreign firms, entry of a domestic firm is likely to increase the equilibrium tariff rate. © Blackwell Publishing Ltd 2004.

    DOI: 10.1111/j.1467-9396.2004.00433.x

    Scopus

    researchmap

  • Aggregate Welfare of the Anas-Arnott Housing Model

    Takeshi Yamazaki

    Review of Economics and Information Studies, Gifu Shotoku Gakuen University   2 ( 1 )   376 - 390   2001.3

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    CiNii Article

    CiNii Books

    researchmap

  • Paradoxical Results in a Lobbying Model of Protection

    Koji Okuguchi, Takeshi Yamazaki

    Review of Economics and Information Studies, Gifu Shotoku Gakuen University   1 ( 1 )   27 - 35   1999.7

     More details

    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    CiNii Article

    CiNii Books

    researchmap

  • Two-Stage Cournot Oligopolies with Industry-Wide Externalities Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    Seoul Journal of Economics   9 ( 1 )   1 - 15   1996.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    researchmap

  • Ad valorem and Specific Taxes, and Optimal Pigouvian Tax within Cournot Oligopoly Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    Keio Economic Studies   31 ( 2 )   25 - 32   1994.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Keio University  

    First, we analyze the effects of a shift from specific to ad valorem taxation within Cournot oligopoly under general conditions on demand and cost functions. Second, we analyze the optimal Pigouvian tax rate for controlling emission of pollution within Cournot oligopoly also under general conditions. The second analysis is an adaptation of the analytical method adopted in the first analysis.

    CiNii Article

    CiNii Books

    researchmap

  • General Analysis of Horizontal Merger Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    Seoul Journal of Economics   7 ( 3 )   279 - 290   1994.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    researchmap

  • Bertrand and Hierarchical Stackelberg Oligopolies with Product Differentiation Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    Keio Economic Studies   31 ( 1 )   75 - 80   1994.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Keio University  

    A hierarchical Stackelberg model where firms' entry is sequential is formulated for price-adjusting oligopoly with product differentiation. The firms' equilibrium prices, outputs and profits are derived and compared in relationship to the order of the firms' entry into the market. These equilibrium values are also compared with those for the non-hierarchical Bertrand oligopoly where all firms' decisions are simultaneously made.

    CiNii Article

    CiNii Books

    researchmap

  • 不完全競争下における間接税の比較分析

    山崎 剛志

    経済と経済学、東京都立大学   74   79 - 91   1993.4

     More details

    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    researchmap

  • クールノー複占とベルトラン複占の安定性

    山崎 剛志

    経済と経済学、東京都立大学   69   101 - 108   1991.4

     More details

    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    researchmap

▶ display all

Books

  • Equilibrium Theory for Cournot Oligopolies and Related Games, Essays in Honour of Koji Okuguchi

    Pierre von Mouche, Federico Quartieri, Eds( Role: Contributor)

    Springer  2016.4 

     More details

    Total pages:294   Responsible for pages:pp. 7~13, pp. 269~279, and pp. 281~294   Language:English Book type:Scholarly book

    researchmap

  • Aggregative Games, Lobbying Models, and Endogenous Tariffs

    Takeshi Yamazaki( Role: Sole author)

    NUSS (Niigata University Scholars Series) Vol.13, Graduate School of Modern Society and Culture, Niigata University  2013.10  ( ISBN:9784902140132

     More details

    Language:English Book type:Scholarly book

    researchmap

MISC

  • On the Works of Professor Koji Okuguchi

    Takeshi Yamazaki

    in Pierre von Mouche and Federico Quartieri (eds), Equilibrium Theory for Cournot Oligopolies and Related Games: Essays in Honour of Koji Okuguchi, Springer Series in Game Theory   7 - 13   2016.4

     More details

    Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    researchmap

Presentations

  • Public-Good Contests with Player Identification International conference

    Takeshi Yamazaki

    42nd Conference of the EARIE (European Association for Research in Industrial Economics)  2015.8  European Association for Research in Industrial Economics

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Munich, Germany  

    researchmap

  • Group-Size Effects in Asymmetric Public-Good Contests International conference

    Takeshi Yamazaki

    PET15 (2015 Conference of the Association for Public Economic Theory)  2015.7  APET (Association for Public Economic Theory)

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Luxembourg, Luxembourg  

    researchmap

  • Asymmetry between Two Players in a Dynamic Race International conference

    Takeshi Yamazaki

    PET13 (2013 Conference of the Association for Public Economic Theory)  2013.7  APET (Association for Public Economic Theory)

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Lisbon, Portugal  

    researchmap

  • Asymmetry Between Two Players in a Simple Model of a Race with Uncertainty International conference

    Takeshi Yamazaki

    50th Anniversary Conference of the Public Choice Society  2013.3  Public Choice Society

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:New Orleans, LA, USA  

    researchmap

  • Heterogeneity and Number of Firms in Rent Seeking, Innovation, and Patent Race Games International conference

    Noriaki Matsushima, Takeshi Yamazaki

    PET10 (2010 Conference of the Association for Public Economic Theory)  2010.6  APET (Association for Public Economic Theory)

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Istanbul, Turkey  

    researchmap

  • Global Stability of Nash Equilibrium under Generalized Hahn Conditions International conference

    Koji Okuguchi, Takeshi Yamazaki

    36th Conference of the EARIE (European Association for Research in Industrial Economics)  2009.9  European Association for Research in Industrial Economics

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Ljubljana, Slovenia  

    researchmap

  • Group-Size Effects on Endogenous Tariff in a Lobbying Contest Model International conference

    Takeshi Yamazaki

    35th Conference of the EARIE (European Association for Research in Industrial Economics)  2008.9  European Association for Research in Industrial Economics

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Toulouse, France  

    researchmap

  • Global Stability of Unique Nash Equilibrium in Cournot Oligopoly and Public Good Game International conference

    Koji Okuguchi, Takeshi Yamazaki

    PET08 (2008 Conference of the Association for Public Economic Theory)  2008.6  APET (Association for Public Economic Theory)

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Seoul, Korea  

    researchmap

  • Global Stability of Unique Nash Equilibrium in Cournot Oligopoly and Rent-Seeking Game International conference

    Koji Okuguchi, Takeshi Yamazaki

    34th Conference of the EARIE (European Association for Research in Industrial Economics)  2007.9  European Association for Research in Industrial Economics

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Valencia, Spain  

    researchmap

  • Global Stability of Unique Nash Equilibrium in Cournot Oligopoly and Rent-Seeking Game International conference

    Koji Okuguchi, Presenter, Takeshi Yamazaki

    6th International ISDG (International Society on Dynamic Games) Workshop  2007.9  International Society on Dynamic Games

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Rabat, Morocco  

    researchmap

  • Existence, Uniqueness and Efficiency of Dynamic Housing Market Equilibrium International conference

    A. Anas (Pr, R. J. Arnott, T. Yamazaki

    47th Annual North American Meetings of the RSAI (Regional Science Association International)  2000.11  Regional Science Association International

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Chicago, IL, USA  

    researchmap

  • Sweeney Equilibria with a Continuum of Quality Levels International conference

    Takeshi Yamazaki

    46th Annual North American Meetings of the RSAI (Regional Science Association International)  1999.11  Regional Science Association International

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Montreal, Canada  

    researchmap

  • Two-Stage Lobbying Model of Protection International conference

    Koji Okuguchi, Presenter, Takeshi Yamazaki

    26th Conference of the EARIE (European Association for Research in Industrial Economics)  1999.9  European Association for Research in Industrial Economics

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Torino, Italy  

    researchmap

  • Hotelling Model with Spatial Search International conference

    Takeshi Yamazaki

    44th Annual North American Meetings of the RSAI (Regional Science Association International)  1997.11  Regional Science Association International

     More details

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Buffalo, NY, USA  

    researchmap

▶ display all

Research Projects

  • 動学的レント・シーキングの理論と応用

    2012.4 - 2017.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

      More details

    Grant type:Competitive

    researchmap

  • レント・シーキングと内生的関税率

    2007.4 - 2011.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

      More details

    Grant type:Competitive

    researchmap

 

Teaching Experience

  • 演習II

    2022
    Institution name:新潟大学

  • 演習I

    2022
    Institution name:新潟大学

  • ミクロ経済学特論

    2021
    Institution name:新潟大学

  • ミクロ経済学演習

    2021
    Institution name:新潟大学

  • 上級ミクロ経済学研究

    2021
    Institution name:新潟大学

  • 上級ミクロ経済理論

    2021
    Institution name:新潟大学

  • 入門ミクロ経済学

    2021
    Institution name:新潟大学

  • 金融論Ⅰ

    2020
    Institution name:新潟大学

  • 経済経営総合演習

    2016
    Institution name:新潟大学

  • 経済学への招待

    2014
    Institution name:新潟大学

  • 演習ⅠA(山崎剛志)

    2014
    -
    2016
    Institution name:新潟大学

  • 演習ⅡA(山崎剛志)

    2014
    -
    2016
    Institution name:新潟大学

  • インターンシップ

    2014
    -
    2015
    Institution name:新潟大学

  • 演習ⅡB(山崎剛志)

    2014
    -
    2015
    Institution name:新潟大学

  • 演習ⅠB(山崎剛志)

    2014
    -
    2015
    Institution name:新潟大学

  • 卒業論文(山崎剛志)

    2014
    -
    2015
    Institution name:新潟大学

  • 上級ミクロ経済学研究

    2012
    -
    2014
    Institution name:新潟大学

  • 卒業論文

    2011
    Institution name:新潟大学

  • スタディスキルズ(経済学科)

    2009
    -
    2017
    Institution name:新潟大学

  • ミクロ経済学入門

    2009
    -
    2015
    Institution name:新潟大学

  • ミクロ経済学Ⅱ

    2008
    Institution name:新潟大学

  • ミクロ経済学Ⅰ

    2008
    Institution name:新潟大学

  • 入門ミクロ経済学

    2008
    -
    2021
    Institution name:新潟大学

  • 演習ⅡB

    2008
    -
    2021
    Institution name:新潟大学

  • 演習ⅡA

    2008
    -
    2021
    Institution name:新潟大学

  • 上級ミクロ経済理論

    2008
    -
    2021
    Institution name:新潟大学

  • 演習ⅠB

    2008
    -
    2020
    Institution name:新潟大学

  • 演習ⅠA

    2008
    -
    2020
    Institution name:新潟大学

  • ミクロ経済理論演習

    2008
    -
    2020
    Institution name:新潟大学

  • ミクロ経済理論特論

    2008
    -
    2020
    Institution name:新潟大学

  • 課題研究Ⅱ

    2008
    -
    2014
    Institution name:新潟大学

  • 課題研究Ⅲ

    2008
    -
    2014
    Institution name:新潟大学

  • 特定研究Ⅲ

    2008
    -
    2014
    Institution name:新潟大学

  • 特定研究Ⅱ

    2008
    -
    2014
    Institution name:新潟大学

  • 特定研究Ⅰ

    2008
    -
    2014
    Institution name:新潟大学

  • 課題研究Ⅰ

    2008
    -
    2014
    Institution name:新潟大学

  • 演習IIB

    2007
    Institution name:新潟大学

  • 演習IA

    2007
    Institution name:新潟大学

  • 演習IIA

    2007
    Institution name:新潟大学

  • 現代ミクロ経済理論

    2007
    Institution name:新潟大学

  • ミクロ経済学基礎

    2007
    Institution name:新潟大学

  • 演習IB

    2007
    Institution name:新潟大学

  • ミクロ経済学I特論

    2007
    Institution name:新潟大学

  • 現代ミクロ経済理論I

    2007
    Institution name:新潟大学

  • 現代ミクロ経済理論II

    2007
    Institution name:新潟大学

  • ミクロ経済学I演習

    2007
    Institution name:新潟大学

▶ display all