Theoretical research on policy coordination among asymmetric countries

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K01727
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 07050:Public economics and labor economics-related
• Research Institution: Hiroshima University
• Principal Investigator: Yamaguchi Chikara 広島大学, 人間社会科学研究科(社), 教授 (60435047)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 国家間の政策協調

Outline of Final Research Achievements

This study analyzes the coalition structure and heterogeneity among countries on the stability and sustainability of coordinated policies in global Prisoner's Dilemmas such as climate change and tax competition. We found that the introduction of income transfers among cooperating countries can destabilize coordination by promoting withdrawal from coordination, and that in the case of partial coordination among countries with asymmetric productivity, the conditions for the sustainability of coordination can be mitigated by appropriately choosing the timing of policy decisions.

Free Research Field

公共経済学

Academic Significance and Societal Importance of the Research Achievements

本研究では、各国の合意に基づく分権的な協調政策について、安定的で持続的な提携行動の特徴について整理を行った。この結果は、環境経済学や租税競争理論への貢献だけではなく、地球温暖化問題の気候変動枠組条約(COP)、安全保障に関する核拡散防止条約(NPT)、税源浸食と利益移転(BEPS)におけるデジタル課税や自由貿易協定(FTA)といった多国間協定の持続的な制度設計（改変）に有益な指針となると考えられる。