Theoretical Analysis on Blocking the World Economy by Governments' Strategic Supply of Public Infrastructure and International Trade

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K01605
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 07040:Economic policy-related
• Research Institution: Nagoya University
• Principal Investigator: TAWADA Makoto 名古屋大学, 経済学研究科, 名誉教授 (10137028)
• Co-Investigator(Kenkyū-buntansha): 柳瀬 明彦 名古屋大学, 経済学研究科, 教授 (10322992)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 戦略的ゲーム / 公共インフラ / 比較優位論 / 非対称均衡

Outline of Final Research Achievements

We considered the supply of public infrastructure of the increasing return type in a traditional general equilibrium trade model and pointed out the possibility of the existence of the multiple equilibria. Then, we introduced the strategic supply game between governments and showed in a model of Ricardian type that the principle of comparative advantage carries over even in the game and trade is gainful to both countries. In the game setting, however, the analysis revealed that the production inefficiency may emerge at the equilibrium and the asymmetric equilibrium possibly appears between identical countries. Proceeding with a more detailed analysis, we investigated the properties of this asymmetric equilibrium. Additionally we showed the equilibrium to become symmetric necessarily if the infrastructure is the type of diminishing returns.

Free Research Field

国際貿易

Academic Significance and Societal Importance of the Research Achievements

近年の世界経済は中国の「一帯一路」構想とアメリカ・日本を中心とする「自由で開かれたインド・太平洋」構想の間での世界経済の覇権争いが顕著になっている。特にこうした国々が大規模な公共インフラを戦略的に供給することで、周辺諸国との貿易を自国に取り組み、貿易による勢力拡大を図り、自国の経済厚生を高めることにある。このような国家間の戦略的公共インフラ供給は世界経済のブロック化を促進させて、世界経済を悪化させる可能性がある。このような場合において、世界経済の悪化を防止するような経済的手段の考察に役立つと考えられる。