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Sekiguchi, Tadashi

Kyoto Institute of Economic Research (KIER) Professor

Sekiguchi, Tadashi
list
    Last Updated :2022/11/23

    Basic Information

    Affiliated programs (koza)

    • Graduate School of Economics, 経済学専攻 資産経済講座, 教授

    Concurrent Affiliation

    • Center for the Promotion of Interdisciplinary Education and Research (C-PiER), 学際融合教育研究推進センター 統合複雑系科学国際研究ユニット

    Professional Memberships

    • エコノメトリック・ソサイエティー
    • 日本経済学会
    • Econometric Society
    • Japanese Economic Association

    Academic Degree

    • 修士(経済学)(東京大学)
    • 博士(経済学)(東京大学)

    Academic Resume (Graduate Schools)

    • 東京大学, 大学院経済学研究科経済理論学専攻博士課程, 修了

    Academic Resume (Undergraduate School/Majors)

    • 東京大学, 経済学部経済学科, 卒業

    Research History

    • From Jun. 2013, To Present
      Institute of Economic Research, Kyoto University, 経済研究所, Professor
    • From Jun. 2013, To Present
      Kyoto University, Institute of Economic Research, 教授
    • From Apr. 2007, To May 2013
      Kyoto University, Institute of Economic Research, 准教授
    • From Oct. 2002, To May 2013
      Institute of Economic Research, Kyoto University, 経済研究所, Associate Professor
    • From Oct. 2002, To Mar. 2007
      Kyoto University, 助教授
    • From Aug. 2001, To Sep. 2002
      Kobe University, Graduate School of Economics, 助教授
    • From Aug. 2001, To Sep. 2002
      Graduate School of Economics, Kobe University, 大学院経済学研究科, Associate Professor
    • From Jul. 1999, To Jul. 2001
      Kobe University, Faculty of Economics, 講師
    • From Jul. 1999, To Jul. 2001
      Faculty of Economics, Kobe University, 経済学部, Assistant Professor
    • From Apr. 1997, To Jun. 1999
      日本学術振興会, 特別研究員
    • From Apr. 1997, To Jun. 1999
      Japan Society for the Promotion of Science, Research Fellow

    Language of Instruction

    • English

    ID,URL

    researchmap URL

    list
      Last Updated :2022/11/23

      Research

      Research Topics, Overview of the research

      • Research Topics

        Dynamic Game Theory and Its Application to Economics
      • Overview of the research

        My research is about theoretical study of dynamic games and, in particular, repeated games, with an emphasis on imperfect monitoring models where each player receives only noisy information about the other players' actions. So far, I have shown (i) the first efficiency result for imperfect private monitoring models where each player receives noisy and private information about the other players' actions, (ii) a general efficiency result/folk theorem for costly monitoring models where precise information is available at costs, and (iii) new equilibrium constructions for optional monitoring models where the monitoring cost is zero, on the basis of strategic possibilities brought about by not exercising the monitoring options.

      Research Interests

      • 契約の理論
      • ゲーム理論
      • ミクロ経済学
      • Contract Theory
      • Game Theory
      • Microeconomics

      Research Areas

      • Humanities & social sciences, Theoretical economics

      Papers

      • Optimal sharing rules in repeated partnerships
        Hajime Kobayashi; Katsunori Ohta; Tadashi Sekiguchi
        JOURNAL OF ECONOMIC THEORY, Nov. 2016, Peer-reviewed
      • Multimarket contact under demand fluctuations
        Tadashi Sekiguchi
        INTERNATIONAL JOURNAL OF GAME THEORY, Nov. 2015, Peer-reviewed
      • Finitely repeated games with monitoring options
        Yasuyuki Miyahara; Tadashi Sekiguchi
        Journal of Economic Theory, Sep. 2013, Peer-reviewed
      • The folk theorem for repeated games with observation costs
        Elichi Miyagawa; Yasuyuki Miyahara; Tadashi Sekiguchi
        JOURNAL OF ECONOMIC THEORY, Mar. 2008, Peer-reviewed
      • Reputation and turnover
        Rafael Rob; Tadashi Sekiguchi
        RAND Journal of Economics, 2006, Peer-reviewed
      • Uniqueness of equilibrium payoffs in finitely repeated games with imperfect monitoring
        T Sekiguchi
        JAPANESE ECONOMIC REVIEW, Sep. 2005, Peer-reviewed
      • Existence of nontrivial equilibria in repeated games with imperfect private monitoring
        T Sekiguchi
        GAMES AND ECONOMIC BEHAVIOR, Aug. 2002, Peer-reviewed
      • The maximum efficient equilibrium payoff in the repeated prisoners' dilemma
        GJ Mailath; Obara, I; T Sekiguchi
        GAMES AND ECONOMIC BEHAVIOR, Jul. 2002, Peer-reviewed
      • Private Strategies in Finitely Repeated Games with Imperfect Public Monitoring
        G. Mailath; S. Matthews; T. Sekiguchi
        Contributions to Theoretical Economics, Vol. 2, Issue 1, Article 2,, 2002, Peer-reviewed
      • A negative result in finitely repeated games with product monitoring
        T Sekiguchi
        ECONOMICS LETTERS, Dec. 2001, Peer-reviewed
      • Efficiency in repeated prisoner's dilemma with private monitoring
        T Sekiguchi
        JOURNAL OF ECONOMIC THEORY, Oct. 1997, Peer-reviewed

      Misc.

      • 長期的関係の理論を学ぶ繰り返しゲームの世界(vol.2)最適カルテル序論
        関口 格
        経済セミナー, Jun. 2010
      • 最新トピックを追え!--ゲーム理論編(vol.6)繰り返しゲームにおける私的観測問題
        関口 格
        経済セミナー, Feb. 2010
      • 協調達成のための正しいお仕置きの仕方
        関口格
        ゲーム理論プラス(経済セミナー増刊)、106-109頁, 2007
      • 「繰り返しゲームの理論-長期的関係の世界」
        関口 格
        第14回RAMPシンポジウム、リーガロイヤルホテル京都, 2002, Peer-reviewed
      • On the Uniqueness of Equilibrium Payoffs in Finitely Repeated Games
        Sekiguchi Tadashi
        Journal of economics and business administration, Nov. 2001
      • RESURGENCE OF THE ABREU-MILGROM-PEARCE FORMULA
        Tadashi Sekiguchi
        Kobe University economic review, 2001
      • ON THE ROLE OF MIXED STRATEGIES IN REPEATED GAMES WITH IMPERFECT PRIVATE MONITORING
        Tadashi Sekiguchi
        Kobe University economic review, 2000

      Works

      • 評判と製品品質
        From 2000, To 2005
      • Product Quality and Reputation
        From 2000, To 2005
      • 観測費用のある繰り返しゲームの研究
        From 2003
      • The Analysis of Repeated Games with Observation Costs
        From 2003
      • 私的情報に依存する戦略の役割
        From 1999, To 2002
      • The Role of Private Strategies
        From 1999, To 2002
      • くり返しゲームの非対称効率均衡の分析
        From 2000, To 2001
      • An Analysis of Asymmetric Efficient Equilibria of Repeated Games
        From 2000, To 2001

      Awards

      • 2014
        Japan Society for the Promotion of Science, JSPS Prize

      External funds: Kakenhi

      • Creation of Incentive Design Science
        Grant-in-Aid for Scientific Research (A)
        Medium-sized Section 61:Human informatics and related fields
        Kyushu University
        横尾 真
        From 01 Apr. 2020, To 31 Mar. 2023, Granted
        ゲーム理論;人工知能;最適化;機械学習;実験経済学
      • 明示解の導出を重視した繰り返しゲーム理論の分析
        Grant-in-Aid for Scientific Research (C)
        Basic Section 07010:Economic theory-related
        Kyoto University
        関口 格
        From 01 Apr. 2018, To 31 Mar. 2022, Granted
        繰り返しゲーム;不完全観測;多市場接触;不完備情報;カルテル;フォーク定理;ゲーム理論;不完全情報;経済理論
      • Analysis on Repeated Games with Automatic and Optional Monitoring
        Grant-in-Aid for Scientific Research (C)
        Kobe University
        宮原 泰之
        From 01 Apr. 2017, To 31 Mar. 2022, Granted
        ゲーム理論;有限回繰り返しゲーム;フォーク定理;私的観測;オプション観測;自動観測;繰り返しゲーム;観測構造;観測オプション;経済理論
      • Establishing a Practical Theory of Market Design
        Grant-in-Aid for Scientific Research (A)
        Kyushu University
        Makoto Yokoo
        From 01 Apr. 2017, To 31 Mar. 2020, Project Closed
        マーケットデザイン;ゲーム理論;マルチエージェントシステム;メカニズムデザイン;オークション;マッチング;資源配分;マッチング理論;オークション理論;繰り返しゲーム;繰返しゲーム
      • Repeated game analysis on long-term partnerships
        Grant-in-Aid for Young Scientists (B)
        Wakayama University
        KATSUNORI OHTA
        From 01 Apr. 2014, To 31 Mar. 2017, Project Closed
        繰り返しゲーム;チーム生産;繰り返しパートナーシップ;Repeated Games;Imperfect Monitoring;Partnerships
      • Endogenous Determinations of Monitoring Structure and Behavioral Analysis of Cooperative Equilibria in Repeated Game Models
        Grant-in-Aid for Scientific Research (C)
        Kyoto University
        Tadashi Sekiguchi
        From 01 Apr. 2014, To 31 Mar. 2019, Project Closed
        繰り返しゲーム;不完全観測;多市場接触;カルテル;再帰的効用;チーム生産;観測オプション;不完備情報;不完全公的観測;不完全私的観測;フォーク定理
      • ゲーム理論の新展開:協力メカニズムの解明
        Grant-in-Aid for Scientific Research (A)
        Kyoto University;Hitotsubashi University
        岡田 章
        From 01 Apr. 2014, To 31 Mar. 2019, Declined
        ミクロ経済理論;ゲーム理論;協力メカニズム;交渉理論;繰り返しゲーム
      • Establishing Theory of Resource Allocation Mechanism Design for Sustainable Development
        Grant-in-Aid for Scientific Research (S)
        Kyushu University
        Makoto Yokoo
        From 31 May 2012, To 31 Mar. 2017, Project Closed
        ゲーム理論;組合せ最適化;マーケットデザイン;マルチエージェントシステム;ミクロ経済学;人工知能
      • Mechanism Design for the diffusion of EV by theoretical and experimental analyses
        Grant-in-Aid for Scientific Research (C)
        Osaka Prefecture University
        TATSUHIRO SHICHIJO
        From 01 Apr. 2011, To 31 Mar. 2014, Project Closed
        電気自動車;ネットワーク外部性;実験経済学;EV
      • Complex Dynamic Analysis on Economic Crisis and Social Infrastructure
        Grant-in-Aid for Specially Promoted Research
        Humanities and Social Sciences
        Kyoto University
        Makoto YANO
        From 01 Apr. 2011, To 31 Mar. 2016, Project Closed
        経済危機;複雑系分析;市場の質;判断力;法制度;経済分析;震災;原発事故;科学技術
      • A Non-Folk-Theorematic Approach to the Theory of Repeated Games
        Grant-in-Aid for Scientific Research (C)
        Kyoto University
        Tadashi SEKIGUCHI
        From 01 Apr. 2008, To 31 Mar. 2012, Project Closed
        繰り返しゲーム;不完全公的観測;チーム生産;シェアリングルール;カルテル;多市場接触;需要変動;観測オプション;協調可能命題;フォーク定理;経済理論;ゲーム理論;不完全観測;ターンオーバー;有限回繰り返しゲーム;ネットワーク;不完全私的観測;費用観測
      • Frontiers of Game Theory: Theory and Applications
        Grant-in-Aid for Scientific Research (S)
        Hitotsubashi University
        Akira OKADA
        From 01 Apr. 2008, To 31 Mar. 2013, Project Closed
        経済理論;ゲーム理論;市場;情報;政治経済学;インセンティブ;交渉理論;繰り返しゲーム;インセンティウ;インセンティヴ
      • Institutional Design using virtual society and laboratory experiments
        Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
        Osaka Prefecture University
        Tatsuhiro SHICHIJO
        From 01 Apr. 2008, To 31 Mar. 2012, Project Closed
        ネットワーク外部性;仮想社会実験;実験経済;数理社会学;ゲーム理論;SNS;実験経済学
      • Repeated games and collusive behavior
        Grant-in-Aid for Young Scientists (B)
        Wakayama University
        Katsunori OHTA
        From 01 Apr. 2007, To 31 Mar. 2009, Project Closed
        繰り返しゲーム;多市場接触;チーム生産;最適シェアリングルール;不完全公的観測;結託;パートナーシップ
      • Formation of collaboration network in long-term relationships
        Grant-in-Aid for Young Scientists (B)
        Osaka Prefecture University
        Hazime KOBAYASHI
        From 01 Apr. 2007, To 31 Mar. 2009, Project Closed
        協調的行動;チーム生産;情報の不完全性;長期的関係;リーダーシップ;関係の多様性;繰り返しゲーム
      • 組織における継続的なインセンティブ付与に関する理論的研究
        Grant-in-Aid for Young Scientists (B)
        Kyoto University
        関口 格
        From 01 Apr. 2005, To 31 Mar. 2008, Project Closed
        繰り返しゲーム;インセンティブ;長期的関係;チーム生産;シェアリングルール;観測費用;私的観測;フォーク定理;複数エージェンシー;トーナメント;パートナーシップ;費用観測;多層的関係的契約;多市場接触
      • 社会における協調と情報ネットワークの関係についての理論的研究
        Grant-in-Aid for Young Scientists (B)
        Kyoto University
        関口 格
        From 01 Apr. 2002, To 31 Mar. 2005, Project Closed
        長期的関係;繰り返しゲーム;私的観測;費用観測;フォーク定理;協調可能;不可能性命題;カルテル;観測費用モデル;協調不可能性命題
      • カルテル抑止的な市場構造の特徴付けについての理論的研究
        Grant-in-Aid for Scientific Research (C)
        Basic Section 07010:Economic theory-related
        Kyoto University
        関口 格
        From 01 Apr. 2022, To 31 Mar. 2026, Granted
        経済理論;ゲーム理論;繰り返しゲーム

      External funds: others

      • Information Structure and Efficiency in Long-Run Relationships
        From 1994, To 2006
      • The Analysis of Repeated Games with Observation Costs
        From 2003, To 2006
      list
        Last Updated :2022/11/23

        Education

        Teaching subject(s)

        • From 01 Apr. 2022, To 31 Mar. 2023
          Mathematics for Economics
          A407, Spring, Graduate School of Economics, 4
        • From 01 Apr. 2022, To 31 Mar. 2023
          Game Theory
          A513, Fall, Graduate School of Economics, 2
        • From Apr. 2011, To Mar. 2012
          ゲーム理論(演習)
          Fall, 経済学研究科
        • From Apr. 2011, To Mar. 2012
          動学ゲーム理論(演習)
          Spring, 経済学研究科
        • From Apr. 2012, To Mar. 2013
          Advanced Microeconomics
          Spring, 経済学研究科
        • From Apr. 2012, To Mar. 2013
          Dynamic Game Theory
          Fall, 経済学研究科
        • From Apr. 2013, To Mar. 2014
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2014, To Mar. 2015
          Special Lecture on Mathematics for Economics
          Spring, 経済学部
        • From Apr. 2014, To Mar. 2015
          Mathematics for Economics
          Spring, 経済学研究科
        • From Apr. 2014, To Mar. 2015
          Game Theory (Seminar)
          Fall, 経済学研究科
        • From Apr. 2015, To Mar. 2016
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2015, To Mar. 2016
          Mathematics for Economics
          Spring, 経済学研究科
        • From Apr. 2016, To Mar. 2017
          ILAS Seminar
          Spring, 全学共通科目
        • From Apr. 2016, To Mar. 2017
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2017, To Mar. 2018
          Dynamic Game Theory
          Spring, 経済学研究科
        • From Apr. 2017, To Mar. 2018
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2018, To Mar. 2019
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2018, To Mar. 2019
          Mathematics for Economics
          Spring, 経済学研究科
        • From Apr. 2019, To Mar. 2020
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2019, To Mar. 2020
          Mathematics for Economics
          Spring, 経済学研究科
        • From Apr. 2020, To Mar. 2021
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2020, To Mar. 2021
          Mathematics for Economics
          Spring, 経済学研究科
        • From Apr. 2021, To Mar. 2022
          Game Theory
          Fall, 経済学研究科
        • From Apr. 2021, To Mar. 2022
          Mathematics for Economics
          Spring, 経済学研究科

        Participation in PhD Defense

        • Essays on Network Effects and Third-degree Price Discrimination
          HASHIZUME RYO, Graduate School of Economics, Sub-chief Examiner
          26 Jul. 2021
        • Three Essays on the Theoretical Analysis of Incentive Contracts
          NANBA TOSHIHIKO, Graduate School of Economics, Sub-chief Examiner
          23 Mar. 2022
        • 企業間の空間的競争の研究
          中川 訓範, Sub-chief Examiner
          24 Mar. 2008
        • Essays on economics of information disclosure(情報公開の経済学的分析)
          中村 友哉, Sub-chief Examiner
          23 Mar. 2011
        • Three Essays on Buy Price Auctions(バイプライス・オークションに関する3つの小論)
          稲見 裕介, Chief Examiner
          26 Mar. 2012
        • 不完備契約と再交渉の非効率性
          村本 顕理, Chief Examiner
          23 Jul. 2015
        • 水資源の国際経済学-気候・人口問題と水利用のネットワーク化
          佐藤 正弘, Sub-chief Examiner
          24 Sep. 2015
        • 社会的選好の諸経済環境への応用
          高梨 誠之, Chief Examiner
          26 Mar. 2018
        • Applications of dynamic game theory to Industrial Organization(産業組織論への動学ゲームの応用)
          野津 隆臣, Chief Examiner
          25 Mar. 2019
        • 投票力指数による政党の研究
          村田 崇暢, Chief Examiner
          25 Mar. 2019
        • Essays on the Theory of Indivisible Good Markets(不可分財市場に関する理論研究)
          丸谷 恭平, Chief Examiner
          23 Mar. 2020
        • Three Essays on Repeated Games and Games with Incomplete Information(繰り返しゲームと不完備情報ゲームに関する三つの小論)
          水 忠昊, Chief Examiner
          23 Mar. 2020

        Part-time lecturer

        • From 01 Oct. 2002, To 31 Mar. 2003
          ミクロ経済学Ⅱ
          神戸大学, 経済学研究科
        list
          Last Updated :2022/11/23

          Administration

          School management (title, position)

          • From 01 Apr. 2012, To 31 Mar. 2013
            広報委員会 委員
          • From 01 Apr. 2011, To 31 Mar. 2013
            広報委員会 委員
          • From 01 Apr. 2011, To 31 Mar. 2013
            広報委員会 紅萠編集専門部会
          • From 01 Oct. 2014
            大学評価委員会点検・評価実行委員会 委員
          • From 01 Apr. 2017, To 31 Mar. 2019
            人権委員会 委員

          Faculty management (title, position)

          • From 01 Apr. 2015, To 31 Mar. 2023
            研究・連携支援室長
          • From 01 Apr. 2012, To 31 Mar. 2019
            共同利用・共同研究委員会 委員
          • From 01 Apr. 2019, To 31 Mar. 2020
            共同利用・共同研究委員会 委員長
          • From 01 Apr. 2014, To 31 Mar. 2015
            経済戦略研究部門担当者
          • From 01 Apr. 2022, To 31 Mar. 2023
            経済戦略研究部門担当者
          • From 01 Apr. 2012, To 31 Mar. 2016
            兼業・兼職所内審議委員会 委員
          • From 01 Apr. 2015, To 31 Mar. 2016
            研究科会議調整委員会(教科委員) 委員
          • From 01 Apr. 2016, To 31 Mar. 2018
            研究室調整委員会 委員
          • From 01 Apr. 2016, To 31 Mar. 2020
            所長代理
          • From 01 Apr. 2014, To 31 Mar. 2020
            人事委員会 委員
          • From 01 Apr. 2020, To 31 Mar. 2023
            人事委員会 副委員長
          • From 01 Apr. 2014, To 31 Mar. 2022
            大学改革構想委員会 委員
          • From 01 Apr. 2012, To 31 Mar. 2022
            評価委員会 委員
          • From 01 Apr. 2022, To 31 Mar. 2023
            評価委員会 副委員長
          • From 01 Apr. 2022, To 31 Mar. 2023
            業績評価委員会 委員
          • From 01 Apr. 2012, To 31 Mar. 2018
            編集・研究会委員会 委員
          • From 01 Apr. 2018, To 31 Mar. 2019
            編集・研究会委員会 副委員長
          • From 01 Apr. 2019, To 31 Mar. 2020
            編集・研究会委員会(兼:経済研究所HP運用責任者) 委員長
          • From 01 Apr. 2017, To 31 Mar. 2023
            人権委員会 委員長
          • From 01 Apr. 2022, To 31 Mar. 2023
            男女共同参画推進委員会 委員
          • From 01 Apr. 2018, To 31 Mar. 2021
            経済戦略研究部門担当者
          • From 01 Apr. 2016, To 31 Mar. 2019
            研究計画・予算委員会 委員長
          • From 01 Apr. 2020, To 31 Mar. 2023
            研究計画・予算委員会 委員長
          • From 01 Apr. 2020, To 31 Mar. 2023
            広報委員会 委員
          • From 01 Apr. 2020, To 31 Mar. 2023
            共同利用・共同研究委員会 委員
          • From 01 Apr. 2020, To 31 Mar. 2024
            副所長
          • From 01 Apr. 2021, To 31 Mar. 2023
            研究室調整委員会 委員

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