Updated on 2024/07/27

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 / Public economics and labor economics

Research History (researchmap)

  • Niigata University   Department of Economics   Professor

    2014.3

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  • Niigata University   Department of Economics   Associate Professor

    2002.4 - 2014.2

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  • Gifu Shotoku Gakuen University   Department of Economics and Information Studies   Associate Professor

    1998.4 - 2002.3

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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

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Education

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

    1995.9 - 2000.6

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Professional Memberships

 

Papers

  • Existence of Unique Equilibrium in Cournot Mixed Oligopoly Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    International Game Theory Review   20 ( 3 )   2018.9

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

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  • 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

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

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  • 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

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

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  • 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

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  • 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

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    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

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  • Global stability of Nash equilibrium in aggregative games Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    International Game Theory Review   16 ( 4 )   2014.12

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    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

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

    Takeshi Yamazaki

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

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

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  • Group-Size Effects on the Endogenous Tariff

    Takeshi Yamazaki

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

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

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  • 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

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

    CiNii Article

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    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

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    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

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  • 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

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    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

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  • 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

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    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

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  • Optimal Subsidies in a Two-Mode Model

    Takeshi Yamazaki

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

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

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    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

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    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

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  • Tarriff rate as a public good Reviewed

    Takeshi Yamazaki

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

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    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

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  • 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

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

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  • 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

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

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

    Koji Okuguchi, Takeshi Yamazaki

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

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  • 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

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    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.

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  • General Analysis of Horizontal Merger Reviewed

    Koji Okuguchi, Takeshi Yamazaki

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

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  • Bertrand and Hierarchical Stackelberg Oligopolies with Product Differentiation Reviewed

    Koji Okuguchi, Takeshi Yamazaki

    Keio Economic Studies   31 ( 1 )   75 - 80   1994.3

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    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.

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  • 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

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

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  • 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

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

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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 

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

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  • 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 ）

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    Language：English Book type：Scholarly book

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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

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

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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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Munich, Germany  

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  • 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)

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Luxembourg, Luxembourg  

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  • 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)

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Lisbon, Portugal  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：New Orleans, LA, USA  

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  • 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)

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Istanbul, Turkey  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Ljubljana, Slovenia  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Toulouse, France  

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  • 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)

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Seoul, Korea  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Valencia, Spain  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Rabat, Morocco  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chicago, IL, USA  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Montreal, Canada  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Torino, Italy  

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  • 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

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Buffalo, NY, USA  

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Research Projects

  • 動学的レント・シーキングの理論と応用

    2012.4 - 2017.3

    System name：科学研究費助成事業

    Research category：基盤研究(C)

    Awarding organization：日本学術振興会

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    Grant type：Competitive

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  • レント・シーキングと内生的関税率

    2007.4 - 2011.3

    System name：科学研究費助成事業

    Research category：基盤研究(C)

    Awarding organization：日本学術振興会

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    Grant type：Competitive

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Teaching Experience

  • 演習 III

    2023
    Institution name：新潟大学

  • 演習 IV

    2023
    Institution name：新潟大学

  • 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ⅡA(山崎剛志)

    2014
    -
    2016
    Institution name：新潟大学

  • 演習ⅠA(山崎剛志)

    2014
    -
    2016
    Institution name：新潟大学

  • 卒業論文(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

  • 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

  • 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Ⅰ

    2008
    Institution name：新潟大学

  • ミクロ経済学Ⅱ

    2008
    -
    2022
    Institution name：新潟大学

  • 入門ミクロ経済学

    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ⅡB

    2008
    -
    2021
    Institution name：新潟大学

  • 演習ⅠB

    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

  • 演習ⅠA

    2008
    -
    2020
    Institution name：新潟大学

  • 特定研究Ⅲ

    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

  • 特定研究Ⅱ

    2008
    -
    2014
    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

  • 現代ミクロ経済理論I

    2007
    Institution name：新潟大学

  • ミクロ経済学I演習

    2007
    Institution name：新潟大学

  • 現代ミクロ経済理論II

    2007
    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

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