KAMEI KEITA

Department of International EconomicsAssociate Professor

ProfileI study international trade and trade policy using theoretical models of imperfect competition and general equilibrium. My recent research focuses on general oligopolistic equilibrium, common ownership, multinational firms, public firms and privatization, and labor-market outcomes. I examine how firm behavior and market structure affect employment, wages, income distribution, and welfare.

Research Keyword

  • Welfare
  • Privatization
  • Public Firms
  • Multinational Firms
  • Common Ownership
  • General Oligopolistic Equilibrium
  • Trade Policy
  • International Trade
  • 国際貿易理論
  • 労働市場
  • 国際経済学
  • 国際貿易
  • 不完全競争

Field of study

  • Humanities & social sciences, Economic policy, Applied Economics
  • Humanities & social sciences, Economic policy, International Trade

Career

  • Apr. 2018 - Present
    Seinan Gakuin University, 経済学部 国際経済学科, 准教授
  • Apr. 2017 - Mar. 2018
    Yamagata University, 人文社会科学部 人文社会科学科 経済・マネジメントコース, 講師
  • Feb. 2015 - Mar. 2017
    Yamagata University, Faculty of Literature and Social Sciences, Department of Law, Economics and Public Policy
  • Apr. 2013 - Jan. 2015
    Japan Society for the Promotion of Science, Research Fellow

Educational Background

  • Apr. 2011 - Mar. 2015, Kyoto University, Graduate School, Division of Economics, 経済学専攻
  • Apr. 2009 - Mar. 2011, Kyoto University, Graduate School, Division of Economics, 経済学専攻
  • 01 Apr. 2007 - 31 Mar. 2009, Tohoku University, Faculty of Economics
  • Apr. 2005 - Mar. 2007, Kushiro Public University of Economics, Faculty of Economics, Department of Economics

Papers

Books and other publications

Lectures, oral presentations, etc.

  • Market Integration with Heterogeneous Firms in General Oligopolistic Equilibrium
    Keita Kamei
    現代経済セミナー, Mar. 2026
  • The Effects of Production Subsidies and Taxation on Employment in Oligopolistic General Equilibrium
    Keita Kamei
    マクロ経済学セミナー, May 2024
  • Wasteful Trade Barriers and Oligopoly
    Keita Kamei
    TG経済学研究会, Feb. 2023
  • Wasteful Trade Barriers in Oligopoly
    Keita Kamei
    日本国際経済学会（関西部会）, Sep. 2022, 日本国際経済学会
  • Wasteful Trade Barriers and Oligopoly
    Keita Kamei
    現代経済セミナー, Jul. 2022, 岡山大学現代経済セミナー
  • 寡占的一般均衡下において公企業行動が賃金・経済厚生に与える影響
    亀井 慶太
    日本国際経済学会（九州・山口地区）, Sep. 2019
  • International trade in general oligopolistic equilibrium with public firms
    Keita Kamei
    日本国際経済学会関西支部, Mar. 2019, Invited
  • International trade in general oligopolistic equilibrium with public firms
    Keita Kamei
    KIER 共同研究プロジェクト主催ワークショップ, Jan. 2019
  • International trade in general oligopolistic equilibrium with public firms
    亀井慶太
    九州地区経済学研究会, Nov. 2018
  • Trade Liberalization, Division of Labor and Welfare under Oligopoly
    Keita Kamei
    第二回山形ワークショップ, Mar. 2017
  • Trade Liberalization, Division of Labor and Welfare under Oligopoly
    Keita Kamei
    KIER 共同研究プロジェクト研究会, Jan. 2017
  • Trade Liberalization and Unemployment in Unionized General Oligopolistic Equilibrium
    Keita Kamei
    日本国際経済学会, Oct. 2016
  • Trade Liberalization, Unemployment and Unionized Oligopoly in a General Equilibrium
    Keita Kamei
    国際経済と経済成長・マクロ経済学に関する山形ワークショップ, Mar. 2016
  • Unemployment and Non-tradable Goods in a Unionized Oligopoly
    Keita Kamei
    KIER 共同研究プロジェクト研究会, Oct. 2015
  • Trade Liberalization, Division of Labor and Imperfect Competition in General Equilibrium
    Keita Kamei
    Summer Workshop on Economic Theory (SWET), Aug. 2015
  • International Trade, Unemployment, and Firm Owners in a General Equilibrium with Oligopoly
    Keita Kamei
    岡山大学現代経済セミナー, Nov. 2014
  • Trade Liberalization, Division of Labor, and Firm Productivity
    Keita Kamei
    日本国際経済学会, Oct. 2014
  • International Trade, General Oligopolistic Equilibrium, and Unemployment
    Keita Kamei
    日本国際経済学会（関西支部）, Jul. 2014
  • International Trade, General Oligopolistic Equilibrium, and Unemployment
    Keita Kamei
    日本経済学会, Jun. 2014
  • Trade Liberalization, Division of Labor, and Firm Productivity
    Keita Kamei
    第8回若手マクロ経済学者のためのコンファレンス, Mar. 2014
  • Dynamic Voluntary Advertising and Vertical Product Quality
    Keita Kamei
    日本経済学会, Jun. 2013
  • Division of Labor and International Trade in General Oligopolistic Equilibrium
    Keita Kamei
    京都大学マクロ経済学研究会, Jun. 2013
  • Industrialization with a Leader of the Manufacturing Sector and International Trade
    Keita Kamei
    日本経済学会, Jun. 2012
  • Industrial Catch-Up and Economic Development: Role of Infrastructure and Public Servant
    Keita Kamei
    神戸大学マクロ経済学研究会, Aug. 2011
  • Industrial Catch-Up and Economic Development: Role of Infrastructure and Public Servant
    Keita Kamei
    京都大学ランチタイムワークショップ, May 2011
  • Structural Change and International Trade: Flexibility of Structural Change and Welfare with Many Countries
    Keita Kamei
    京都大学マクロ経済学研究会, Jan. 2011

Academic society affiliations

  • THE JAPAN SOCIETY OF INTERNATIONAL ECONOMICS
  • JAPANESE ECONOMIC ASSOCIATION

Research Themes

Academic Contribution Activities

  • Secretary, Kyushu-Yamaguchi District Research Meeting, Japan Society of International Economics
    Planning etc
    Kyushu-Yamaguchi District Research Meeting, Japan Society of International Economics, 2025 - Present
  • Economics Bulletin
    Peer review
    01 Jan. 2026
  • Journal of Economics & Management Strategy
    Peer review
    01 Jan. 2025 - 31 Dec. 2025
  • Bulletin of Economic Research
    Peer review
    01 Jan. 2023 - 31 Dec. 2023
  • The World Economy
    Peer review
    01 Jan. 2022 - 31 Dec. 2023
  • Economic Modelling
    Peer review
    01 Jan. 2021 - 31 Dec. 2021
  • Economics Bulletin
    Peer review
    01 Jan. 2021 - 31 Dec. 2021
  • Evolutionary and Institutional Economics Review
    Peer review
    01 Jan. 2020 - 31 Dec. 2021
  • Economics Letters
    Peer review
    01 Jan. 2019 - 31 Dec. 2019
  • Manchester School
    Peer review
    01 Jan. 2018 - 31 Dec. 2018
  • Feminist Economics
    Peer review
    01 Jan. 2018 - 31 Dec. 2018