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Analysis on Repeated Games with Automatic and Optional Monitoring

Research Project

Project/Area Number 17K03625
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Economic theory
Research InstitutionKobe University

Principal Investigator

Miyahara Yasuyuki  神戸大学, 経営学研究科, 教授 (80335413)

Co-Investigator(Kenkyū-buntansha) 関口 格  京都大学, 経済研究所, 教授 (20314461)
Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords有限回繰り返しゲーム / 私的観測 / 自動観測 / オプション観測 / フォーク定理 / ゲーム理論 / 繰り返しゲーム / 観測構造 / 観測オプション / 経済理論
Outline of Final Research Achievements

This study is concerned with repeated games with automatic and optional monitoring. The main objective of this study is to identify how the equilibrium payoff set changes as this probability increases, assuming a situation in which we automatically know complete information about the actions chosen by the other players with a certain probability The main objective of this study is to identify how the equilibrium gain set changes when this probability increases. For any stage game and any number of repetition, we found that the equilibrium payoff set gets large when the automatic observation probability is small, given two types of automatic observation probabilities. We also show that the Folk Theorem holds when the Nash equilibrium of the stage game is unique.

Academic Significance and Societal Importance of the Research Achievements

本研究の主要命題は、情報が自動的に伝達される確率が小さい方がある意味、社会にとって好ましいということをこの命題は主張している。一見すると現実の感覚からは逆説的に思われるが、実を言うとゲーム理論的には納得のいく主張になっている。それは自動的に情報が得られなかった場合には観測するオプションがあるため、戦略的自由度が高いことによる。ただし、戦略的自由度が高いことが直ちに均衡利得集合を拡大するということはそれほど自明ではない。この直感が実際に正しいことを明らかにしたことが本研究の大きな貢献である。また、段階ゲームのナッシュ均衡が一意であったとしても、フォーク定理が成り立つことを示したことも貢献である。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 2018 2017

All Journal Article (1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] 会議による社会的損失に関する一考察2018

    • Author(s)
      宮原泰之
    • Journal Title

      国民経済雑誌

      Volume: 217 Pages: 61-77

    • NAID

      120006624209

    • Related Report
      2017 Research-status Report
  • [Presentation] A Folk Theorem for Infinitely Repeated Games with Equivalent Payoffs under Optional Monitoring2021

    • Author(s)
      Tadashi Sekiguchi
    • Organizer
      91st Annual Meeting of the Southern Economic Association
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Folk Theorem for Infinitely Repeated Games with Equivalent Payoffs under Optional Monitoring2020

    • Author(s)
      関口 格
    • Organizer
      ゲーム理論ワークショップ2020
    • Related Report
      2019 Research-status Report
  • [Presentation] A Folk Theorem for Repeated Games with Equivalent Payoffs under Optional Monitoring2019

    • Author(s)
      Tadashi Sekiguchi
    • Organizer
      The Lisbon Meetings in Game Theory and Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Finitely Repeated Games with Automatic and Optional Monitoring2019

    • Author(s)
      関口格
    • Organizer
      Theory Workshop at Department of Economics, University of Rochester
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Communication Enhancement through Information Acquisition by Uninformed Player2019

    • Author(s)
      宮原泰之
    • Organizer
      WEAI Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Finitely Repeated Games with Automatic and Optional Monitoring2017

    • Author(s)
      関口格
    • Organizer
      2017 Asian Meeting of the Econometric Society
    • Related Report
      2017 Research-status Report
  • [Presentation] Communication Enhancement through Information Acquisition by Uninformed Player2017

    • Author(s)
      宮原泰之
    • Organizer
      International Conference on Game Theory
    • Related Report
      2017 Research-status Report
  • [Presentation] Finitely Repeated Games with Automatic and Optional Monitoring2017

    • Author(s)
      関口各
    • Organizer
      日本経済学会
    • Related Report
      2017 Research-status Report
  • [Book] 組織の経済学2019

    • Author(s)
      伊藤 秀史、小林 創、宮原 泰之
    • Total Pages
      414
    • Publisher
      有斐閣
    • ISBN
      9784641165502
    • Related Report
      2019 Research-status Report

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Published: 2017-04-28   Modified: 2023-01-30  

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