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Mathematical Approaches to Social Systems and Multicellular Dynamics

Planned Research

Project AreaDynamic cell community science starting with bone imaging
Project/Area Number 22H05086
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (III)
Research InstitutionThe University of Tokyo

Principal Investigator

Cato Susumu  東京大学, 社会科学研究所, 教授 (30553101)

Co-Investigator(Kenkyū-buntansha) 呂 沢宇  東北大学, 文学研究科, 准教授 (30966312)
図斎 大  関西学院大学, 経済学部, 教授 (60868850)
澤 亮治  筑波大学, システム情報系, 教授 (70644566)
五十嵐 彰  大阪大学, 大学院人間科学研究科, 准教授 (90844762)
Project Period (FY) 2022-05-20 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2024: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2023: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2022: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Keywords社会科学 / 社会的選択理論 / コミュニティ / 動的多細胞 / ゲーム理論 / 進化
Outline of Research at the Start

社会のなかには、近所づきあいや趣味のサークルをはじめ、さまざまなコミュニティが存在する。コミュニティ内部では、人びとの間の「つながり」があり、それが助け合いや争いごとを起こし、コミュニティの変化の仕方やレジリエンスといったものの源泉となっている。このようなコミュニティのダイナミズムの源泉となる「つながり」は、社会科学分野でひろく注目されている。本研究では、コミュニティやその内部における「つながり」などの社会的概念を、実際の人間のコミュニティに関する知見を蓄積しながら、社会的選択理論とゲーム理論の二つを応用して数理的定式化を行い、細胞のコミュニティの動態を解析するための手法を開発する。

Outline of Final Research Achievements

This research conducts theoretical and mathematical analyses of communities and related concepts, with a focus on social choice theory and game theory. In particular, it combines axiomatic methods with evolutionary game dynamics to investigate the nature of rationality criteria in contexts involving population change, interspecies balance, intra-group equality, and the evolutionary foundations of majority rule. By identifying structural parallels between human and cellular communities, the study also explores transformations in “connectedness” and “social relations,” drawing on empirical findings from immigration studies and research on mechanisms of discrimination. Additionally, the project examines opinion formation processes in the aftermath of tragic events, using real-world cases. To better understand the dynamic evolution of communities, it incorporates simulation analyses, social surveys, and imaging data related to cellular movement.

Academic Significance and Societal Importance of the Research Achievements

これまで、ゲーム理論アプローチと社会的選択理論の集計アプローチは、関連性を認められつつも、密接な結びつきがあったとは言い難い。これらの結びつきを検討しながら、多細胞の解析という、これまで試みられてこなかった文理融合の課題をおこなった。また、こうした文理融合の研究の可能性をできるだけ広くアウトリーチすることにも積極的に取り組んできた。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • Research Products

    (39 results)

All 2025 2024 2023 2022

All Journal Article (23 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 20 results,  Open Access: 13 results) Presentation (16 results) (of which Int'l Joint Research: 6 results,  Invited: 5 results)

  • [Journal Article] Positional conditional egalitarianism2025

    • Author(s)
      Cato Susumu、Oshitani Ken
    • Journal Title

      Inquiry

      Volume: -- Pages: 1-11

    • DOI

      10.1080/0020174x.2025.2469255

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rational Incompetence of Voters2025

    • Author(s)
      Cato Susumu
    • Journal Title

      Journal of Ethics and Social Philosophy

      Volume: 30 Issue: 2 Pages: 329-338

    • DOI

      10.26556/jesp.v30i2.4053

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tsunami-tendenko follows the antiextinction principle, not utilitarianism2024

    • Author(s)
      Cato Susumu、Oshitani Ken
    • Journal Title

      Journal of Medical Ethics

      Volume: Online First Issue: 3 Pages: 203-204

    • DOI

      10.1136/jme-2023-109674

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Timeslice Prioritarianism, Prudence, and Weak Pareto2024

    • Author(s)
      Cato Susumu、Hirose Iwao
    • Journal Title

      Australasian Journal of Philosophy

      Volume: - Issue: 2 Pages: 1-6

    • DOI

      10.1080/00048402.2024.2416983

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Smallest quasi-transitive extensions2024

    • Author(s)
      Bossert Walter、Cato Susumu、Kamaga Kohei
    • Journal Title

      Journal of Mathematical Economics

      Volume: 112 Pages: 102983-102983

    • DOI

      10.1016/j.jmateco.2024.102983

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The evolution of collective choice under majority rules2024

    • Author(s)
      Okada Akira、Sawa Ryoji
    • Journal Title

      Journal of Economic Behavior & Organization

      Volume: 225 Pages: 290-304

    • DOI

      10.1016/j.jebo.2024.06.039

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stable dystopia: A critique of the circular definition of stability in Nozick’s model of utopia2024

    • Author(s)
      Cato Susumu、Chung Hun
    • Journal Title

      Analysis

      Volume: 84 Issue: 3 Pages: 465-475

    • DOI

      10.1093/analys/anad091

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Acyclic population ethics and menu-dependent relations2024

    • Author(s)
      Cato Susumu
    • Journal Title

      Economics and Philosophy

      Volume: -- Issue: 2 Pages: 1-13

    • DOI

      10.1017/s0266267124000294

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sufficientarianism and incommensurability2024

    • Author(s)
      Cato Susumu
    • Journal Title

      Philosophical Studies

      Volume: 181 Issue: 12 Pages: 3439-3458

    • DOI

      10.1007/s11098-023-02097-0

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-species Population Ethics with Critical Levels2024

    • Author(s)
      Cato Susumu、Ishida Shu
    • Journal Title

      Erkenntnis

      Volume: -- Issue: 2 Pages: 541-560

    • DOI

      10.1007/s10670-024-00898-1

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Repugnance at the limit2024

    • Author(s)
      Cato Susumu、Harada Ko、Oshitani Ken
    • Journal Title

      Ratio

      Volume: 37 Issue: 2-3 Pages: 231-240

    • DOI

      10.1111/rati.12409

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Xから浮かび上がる 東京2020パラリンピック競技大会と障害者への意識~計算社会科学におけるソーシャルメディア分析技術の応用~2024

    • Author(s)
      下窪拓也, 呂 沢宇, 永吉希久子, 瀧川裕貴, 渡辺誓司, 中村美子
    • Journal Title

      放送研究と調査

      Volume: -- Pages: 2-31

    • Related Report
      2024 Annual Research Report
    • Open Access
  • [Journal Article] A new result on the impossibility of avoiding both the repugnant and sadistic conclusions2023

    • Author(s)
      Cato Susumu、Harada Ko
    • Journal Title

      Economics Letters

      Volume: 232 Pages: 111306-111306

    • DOI

      10.1016/j.econlet.2023.111306

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Potential rationality in collective decision-making2023

    • Author(s)
      Cato Susumu
    • Journal Title

      Synthese

      Volume: 202 Issue: 6 Pages: 183-183

    • DOI

      10.1007/s11229-023-04365-2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Infection control, subjective estimates, and the ethics of testing during the COVID‐19 pandemic2023

    • Author(s)
      Cato Susumu、Ishida Shu
    • Journal Title

      Bioethics

      Volume: 37 Issue: 9 Pages: 897-903

    • DOI

      10.1111/bioe.13229

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Independent, neutral, and monotonic collective choice: the role of Suzumura consistency2023

    • Author(s)
      Bossert Walter、Cato Susumu、Kamaga Kohei
    • Journal Title

      Social Choice and Welfare

      Volume: 61 Issue: 4 Pages: 835-852

    • DOI

      10.1007/s00355-023-01472-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Are good leaders truly good?2023

    • Author(s)
      Cato Susumu、Inoue Akira
    • Journal Title

      Analysis

      Volume: 83 Issue: 3 Pages: 437-446

    • DOI

      10.1093/analys/anad001

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Trade-Off Between Repugnant and Sadistic Conclusions Under the Separability of People’s Lives2023

    • Author(s)
      Cato Susumu
    • Journal Title

      In: Adachi, Y., Usami, M. (eds) Governance for a Sustainable Future: The State of the Art in Japan (pp. 93-108)

      Volume: 0 Pages: 93-108

    • DOI

      10.1007/978-981-99-4771-3_6

    • ISBN
      9789819947706, 9789819947713
    • Related Report
      2023 Annual Research Report
  • [Journal Article] Evolutionary dynamics in heterogeneous populations: a general framework for an arbitrary type distribution2023

    • Author(s)
      Zusai Dai
    • Journal Title

      International Journal of Game Theory

      Volume: 52 Issue: 4 Pages: 1215-1260

    • DOI

      10.1007/s00182-023-00867-y

    • NAID

      120007033384

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] When is weak Pareto equivalent to strong Pareto?2023

    • Author(s)
      Cato Susumu
    • Journal Title

      Economics Letters

      Volume: 222 Pages: 110953-110953

    • DOI

      10.1016/j.econlet.2022.110953

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 実践と公正: フェアプレイをめぐる概念分析と経済分析2023

    • Author(s)
      加藤晋、宮本雅也
    • Journal Title

      社会科学研究

      Volume: 74, Pages: 45-61

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Thresholds, critical levels, and generalized sufficientarian principles2022

    • Author(s)
      Bossert Walter、Cato Susumu、Kamaga Kohei
    • Journal Title

      Economic Theory

      Volume: - Issue: 4 Pages: 1099-1139

    • DOI

      10.1007/s00199-022-01439-z

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Understanding the Function of a Social Business Ecosystem2022

    • Author(s)
      Cato Susumu、Nakamura Hiroki
    • Journal Title

      Sustainability

      Volume: 14 Issue: 15 Pages: 9325-9325

    • DOI

      10.3390/su14159325

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] AI-augmented Synthetic Social Survey Data: Can Large Language Models Predict Public Opinion?2025

    • Author(s)
      Zeyu Lyu, Zhichao Wang
    • Organizer
      数理社会学会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Unequal Bids: The Impact of Regional Economic Conditions and Feedback on Bidding Strategies in Online Labor Markets2025

    • Author(s)
      Zhichao Wang, Zeyu Lyu
    • Organizer
      計算社会科学会大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Population ethics with thresholds2024

    • Author(s)
      Susumu Cato
    • Organizer
      PPE conference
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Population ethics with thresholds2024

    • Author(s)
      Susumu Cato
    • Organizer
      East Asia Game Theory Conference 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fair Quasi-Orderings2024

    • Author(s)
      Susumu Cato
    • Organizer
      17th Meeting of the Society for Social Choice and Welfare
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Population ethics with thresholds2024

    • Author(s)
      Susumu Cato
    • Organizer
      Value Theory workshop
    • Related Report
      2024 Annual Research Report
  • [Presentation] Leveraging Large Language Models to Understand the Opinion of Polarization2024

    • Author(s)
      Zeyu Lyu
    • Organizer
      国際ワークショップ「計算社会科学の社会学的基盤」, Kyoto, Japan, Feb 2024
    • Related Report
      2023 Annual Research Report
  • [Presentation] Non-binary population ethics and the mere addition paradox2023

    • Author(s)
      Susumu Cato
    • Organizer
      Workshop on Collective Decisions: Current Trends
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Non-binary population ethics and the mere addition paradox2023

    • Author(s)
      Susumu Cato
    • Organizer
      SAET (Society for the Advancement of Economic Theory) conferences in Paris
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The power of majorities under the Borda rule2023

    • Author(s)
      Susumu Cato
    • Organizer
      PPE conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The evolution of preferences in a haystack model with finite populations2023

    • Author(s)
      Ryoji Sawa
    • Organizer
      慶應義塾大学経済研究所 ミクロ経済学ワークショップ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Net gains in evolutionary dynamics2023

    • Author(s)
      Dai Zusai
    • Organizer
      慶應義塾大学経済研究所 ミクロ経済学ワークショップ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Evolutionary dynamics in heterogeneous populations: a general framework for an arbitrary type distribution2023

    • Author(s)
      Dai Zusai
    • Organizer
      日本経済学会 秋季大会 2023年9月17日
    • Related Report
      2023 Annual Research Report
  • [Presentation] Generic disaggregability of adaptive economic dynamics: in the short, medium and long run2023

    • Author(s)
      Dai Zusai
    • Organizer
      SWET 2023 ミクロ経済学・ゲーム理論 2023年8月9日
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] The sufficientarian principle and incommensurability2022

    • Author(s)
      Susumu Cato
    • Organizer
      Incommensurability and Population-level bioethics at Rutgers University
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] The trade-off between the repugnant and sadistic conclusions under Population axiology and separability of people’s lives2022

    • Author(s)
      Susumu Cato
    • Organizer
      Workshop on Principles for Sustainability
    • Related Report
      2022 Annual Research Report

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Published: 2022-05-25   Modified: 2026-01-16  

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