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Analysis of income inequality and economic growth with non-homothetic preferences

Research Project

Project/Area Number 19K01674
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 07040:Economic policy-related
Research InstitutionKobe University

Principal Investigator

Iwasa Kazumichi  神戸大学, 経済経営研究所, 教授 (00534596)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords非相似拡大的選好 / 動学的貿易モデル / 所得格差 / 不決定性 / 資産市場 / 非効率性 / 内生的時間選好
Outline of Research at the Start

本研究では、二種類の消費財が存在する二部門成長モデルに、非相似拡大的選好を導入することで、所得格差の存在や拡大が経済の成長経路や長期的均衡に及ぼす影響に関して、定性的な分析を行うとともに、課税や所得移転などの経済政策の効果を定量的に評価することを目的とする。本研究には、異時点間の消費の代替弾力性が一定で非相似拡大的な効用関数の特定と、消費財と消費可能な資本財という分割を行った際における各財の所得弾力性を現実のデータから導き出すこと、および大域的な均衡経路が示し得る複雑な挙動の解析も含まれる。

Outline of Final Research Achievements

In a theoretical model in which indeterminacy occurs, with non-homothetic preferences, I have shown that indeterminacy occurs under more moderate conditions by removing the production-side conditions that had been placed on it.

In a dynamic trade model with varying subjective discount rates,I have derived the conditions for the possibility of a developing country catching up with a developed country, by assuming that the discount rate depends on the income level of its trading partners in addition to its own income level.

Academic Significance and Societal Importance of the Research Achievements

現実のデータと整合的な非相似拡大的選好、あるいは一定でない主観的割引率を理論モデルに導入することで、より現実に即したモデルを構築して理論分析を行った。そして、経済の均衡経路の安定性に関する条件、あるいは、国際貿易によって発展途上国が先進国にキャッチアップするための条件について、これまで示されていない結果を導出し、各財の所得弾力性の相違といった需要サイドに関わる条件を明らかにした。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2020

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Indeterminacy in a Model with Production Externality and Inferiority in Consumption2022

    • Author(s)
      Kazumichi Iwasa, Kazuo Nishimura
    • Journal Title

      International Journal of Economic Theory

      Volume: - Issue: 4 Pages: 607-623

    • DOI

      10.1111/ijet.12324

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inequality and catching-up under decreasing marginal impatience2020

    • Author(s)
      Iwasa Kazumichi、Zhao Laixun
    • Journal Title

      Journal of Mathematical Economics

      Volume: 91 Pages: 99-110

    • DOI

      10.1016/j.jmateco.2020.08.009

    • NAID

      120006954868

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 貿易と大域的不決定性2020

    • Author(s)
      岩佐 和道
    • Journal Title

      国民経済雑誌

      Volume: 221 Pages: 71-82

    • NAID

      120007002553

    • Related Report
      2020 Research-status Report 2019 Research-status Report
  • [Journal Article] Time preference and international trade2020

    • Author(s)
      Kazumichi Iwasa, Kazuo Nishimura
    • Journal Title

      International Journal of Economic Theory

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] On the Characterization of the Steady-State Equilibrium in a Dynamic Two-Country Model with Financial Transactions2023

    • Author(s)
      Kazumichi Iwasa
    • Organizer
      IEFS Japan Annual Meeting 2023
    • Related Report
      2023 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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