Theory of local interaction games and spatial economics

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K01556
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 07010:Economic theory-related
• Research Institution: The University of Tokyo
• Principal Investigator: Oyama Daisuke 東京大学, 大学院経済学研究科(経済学部), 教授 (00436742)
• Co-Investigator(Kenkyū-buntansha): 藤嶋 翔太 一橋大学, 大学院経済学研究科, 准教授 (50706835)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: interaction game / network game / contagion / spatial economics / agglomeration / economic growth

Outline of Final Research Achievements

The purpose of this project has been to enhance our understanding, from a unified perspective based on game theory, on strategic interactions through space, time, and information. I obtained new results and insights on the relationship between spatial agglomeration of industries and economic growth, continuous limit approximation of finite-player stochastic games, and the robustness of equilibria to incomplete information. These have been published or reported in international referred journals and conferences.

Free Research Field

ゲーム理論，経済理論

Academic Significance and Societal Importance of the Research Achievements

多地域経済成長の分析については，資本蓄積および立地選択に関する通時的意思決定を取り入れた理論モデルを構築し，均衡の大域安定性を厳密に分析することができた．有限人プレイヤーの確率ゲームの連続極限近似の分析については，やはり forward-looking なプレイヤーを扱って均衡集合一様に成り立つ近似定理を示すことができた．不完備情報に対する均衡の頑健性については，前回の研究課題をより精緻化する結果を得ることができた．