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Self-organizing regularity in a spatial economy: Development of new theoretical and empirical framework

Research Project

Project/Area Number 16K13360
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Economic policy
Research InstitutionKyoto University

Principal Investigator

Mori Tomoya  京都大学, 経済研究所, 教授 (70283679)

Research Collaborator Akamatsu Takashi  
Takayama Yuki  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords経済集積 / 都市規模 / べき乗則 / フラクタル / スーパーコンピューター / 都市システム / 自己組織化 / 秩序形成 / 大型計算機 / 並列計算 / 冪乗則 / 中心地理論 / 経済政策 / 経済理論 / ハイパフォーマンスコンピューティング / 集積
Outline of Final Research Achievements

This research aimed to develop a systematic numerical framework for studying micro-founded general equilibrium models for endogenous city formation based on agglomeration economies. Specifically, a recent development of numerical optimization theory has been incorporated in the self-organization of the location process of mobile agents. This in turn made it possible to identify stable equilibria of an economy despite the non-linearity in a high-dimensional system. This in turn made it possible to generate a reasonable amount of Monte-Carlo samples of stable equilibria of a hypothetical economy with essentially the same order of diversity in the degrees of increasing returns in the reality.
Furthermore, based on the data from Japan, US, Europe, China and India, empirical evidence for the self-organizing regularity in size, spacing and industrial composition of cities were established. The developed numerical methods are applied to theoretially replicate these regularities.

Academic Significance and Societal Importance of the Research Achievements

本研究では、経済集積の秩序形成について日本のデータを中心に実証するとともに、そのメカニズムを理論化し、多様な経済活動の集積とそれらの空間的同期現象の結果として説明した。一国経済規模で起こる秩序形成の事実は、個々の都市の規模・産業構造等経済的な性質が、より広域な地域経済の構造と、秩序形成を介して相互依存することを意味し、そのメカニズムの定式化は、経済政策やインフラ整備が個々の地域経済に及ぼす効果を評価するために不可欠な手続きとなる。
また、本研究では10万次元を超える高次非線形システムの均衡解をランダム抽出する効率的手法を開発し、より一般的な非線形モデルへの応用が期待される先駆的な成果を得た。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2018 2017 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Open Access: 2 results,  Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] Heinrich-Heine-University Duesseldorf(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Singapore Management University(シンガポール)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Pennsylvania(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Pennsylvania(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Singapore Management University(シンガポール)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Inter-city trade2018

    • Author(s)
      Tomoya Mori and Jens Wrona
    • Journal Title

      CESifo Working Paper

      Volume: 7233 Pages: 1-53

    • Related Report
      2018 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Spatial pattern and city size distribution2018

    • Author(s)
      Tomoya Mori
    • Journal Title

      Discussion paper, Institute of Economic Research, Kyoto University

      Volume: 996 Pages: 1-24

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] Evolution of the size and industrial structure of cities in Japan between 1980 and 20102017

    • Author(s)
      Tomoya Mori
    • Journal Title

      Asian Development Review

      Volume: 34 Issue: 2 Pages: 86-113

    • DOI

      10.1162/adev_a_00096

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Highways, high-speed railways and the growth of Japanese cities2018

    • Author(s)
      森知也
    • Organizer
      第32回応用地域学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Highways, high-speed railways and the growth of Japanese cities2018

    • Author(s)
      武田航平
    • Organizer
      The 2nd Conference on Urban and Regional Economics,Singapore Management University
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 空間経済における恒常的な撹乱と安定的な秩序2017

    • Author(s)
      森知也
    • Organizer
      数理地理モデリング研究会(京都大学数理解析研究所)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 空間経済学における構造モデル分析:理論及び数値解析の方法 (概要)2017

    • Author(s)
      森知也
    • Organizer
      集中講義: 空間経済学における構造モデル分析:理論及び数値解析の方法 (京都大学経済研究所)
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2022-02-22  

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