MORITA Tadashi

    Department of Public Management Associate Professor
Last Updated :2023/11/29

Researcher Information


Research funding number

  • 50635175

J-Global ID

Research Areas

  • Humanities & social sciences / Theoretical economics

Academic & Professional Experience

  • 2015/04 - Today  Kindai UniversityFaculty of Economics
  • 2021/09 - 2022/08  University of Potsdam, Visiting researcher
  • 2014/04 - 2015/03  Kindai University経済学部講師
  • 2013 - 2014/03  Osaka Gakuin UniversityFaculty of Economics講師
  • 2011/07 - 2012/03  Kyoto UniversityInstitute of Economic Research研究員


  • 2006/04 - 2011/03  大阪大学 大学院  経済学研究科
  • 2002/04 - 2006/03  Osaka University  School of Economics

Association Memberships


Published Papers

  • Juan Carlos Lopez; Tadashi Morita
    Journal of Regional Science 2023 [Refereed]
  • A Note on Variable Markup, Knowledge Spillover, and Multiple Steady States in the Variety Expansion Model
    Macroeconomic Dynamics 2022 [Refereed]
  • Demographics and Tax Competition in Political Economy
    Tadashi Morita; Yasuhiro Sato; Kazuhiro Yamamoto
    International Tax and Public Finance 2020 [Refereed]
  • Subsidy Competition, Imperfect Labor Market, and Endogenous Entry of Firms
    Tadashi Morita; Yukiko Sawada; Kazuhiro Yamamoto
    Journal of Public Economic Theory 2019 [Refereed]
  • Takanori Ago; Tadashi Morita; Takatoshi Tabuchi; Kazuhiro Yamamoto
    Journal of Regional Science Blackwell Publishing Inc. 58 (2) 350 - 362 1467-9787 2018/03 [Refereed]
    This study analyzes the interplay between the agglomeration of economic activities and interregional differences in working hours, which are typically longer in large cities, as they are normally more developed than small cities. For this purpose, we develop a two-region model with endogenous labor supply. Although we assume a symmetric distribution of immobile workers, the symmetric equilibrium breaks in the sense that firms may agglomerate when trade costs are intermediate and labor supply is elastic. We also show that the price index is always lower, while labor supply, per capita income, real wages, and welfare are always higher in the more agglomerated region.
  • Takanori Ago; Tadashi Morita; Takatoshi Tabuchi; Kazuhiro Yamamoto
    INTERNATIONAL JOURNAL OF ECONOMIC THEORY WILEY 13 (1) 73 - 94 1742-7355 2017/03 [Refereed]
    We construct an international trade model with an elastic labor supply and analyze the impacts of technological progress on the equilibrium outcomes of working hours and economic welfare. We show that the labor supply is inverted U-shaped with respect to technological progress. We also show that welfare is U-shaped with respect to trade costs whereas welfare and technological progress are positively related. We then show that working hours in developed countries are longer in the first stages of development, but shorter in the second stages of development.
  • Inter-regional fertility differentials and agglomeration
    Tadashi Morita; Kazuhiro Yamamoto
    Japanese Economic Review 2016 [Refereed]
  • Tadashi Morita; Hajime Takatsuka; Kazuhiro Yamamoto
    JAPANESE ECONOMIC REVIEW WILEY-BLACKWELL 66 (4) 492 - 519 1352-4739 2015/12 [Refereed]
    This article examines the effects of globalization, by especially focusing on the relaxation of local equity requirements (LERs) in developing countries. By constructing an endogenous growth model, where profit leakage to the South through LERs plays a key role, we obtain the following results. First, the relaxation of LERs in the South drives the relocation of firms from the North to the South, yielding a U-shaped growth rate. Second, our numerical simulations suggest that a sufficient relaxation of LERs is beneficial for the South, although the shared profit of joint ventures is maximized through the use of LERs.
  • Tadashi Morita; Kouki Sugawara
    We construct an overlapping generation model with human capital accumulation to analyze the effect of human capital level on foreign direct investment (FDI) in a small open developing country. In particular, we assume that manufactured goods have the human capital intensive technology and young agents choose whether to work or to educate themselves. When the human capital level in the developing country is sufficiently small, manufactured goods firms do not conduct FDI and the economy in the developing country is trapped in poverty. If the government of the developing country levies a tariff on the imports of manufactured goods, manufacturers conduct FDI, and the economy in the developing country can escape from the poverty trap.
  • The Relationship among Cost-Reducing R&D Investment, Occupational Choice, and Trade
    Tadashi Morita
    Theoretical Economics Letters 4 (9) 875 - 888 2014/12 [Refereed]
  • Asuka Oura; Tadashi Morita
    ECONOMIC MODELLING ELSEVIER SCIENCE BV 32 347 - 350 0264-9993 2013/05 [Refereed]
    In this paper, to investigate how an increase in the price of natural resources affects the level of technology, we develop an endogenous variety expansion model of a small open economy based on that of Grossman and Helpman (1991, Ch. 3). We conclude that an increase in the price of natural resources has a neutral effect on the level of technology in the long run. (C) 2013 Elsevier B.V. All rights reserved.
  • Tadashi Morita
    JOURNAL OF MACROECONOMICS LOUISIANA STATE UNIV PR 34 (4) 1063 - 1076 0164-0704 2012/12 [Refereed]
    This paper constructs a North-South endogenous growth model to investigate how the organizational forms of final goods firms evolve. Initially, the final goods firms in the North obtain intermediate goods from Northern firms and produce in the North. When trade costs are sufficiently low, as the economy develops, the final goods firms produce the final goods in the North and obtain the intermediate goods from Southern firms. As the economy develops further, they produce the final goods in the South and obtain intermediate goods from Southern firms. (C) 2012 Elsevier Inc. All rights reserved.
  • Tadashi Morita
    REVIEW OF INTERNATIONAL ECONOMICS WILEY-BLACKWELL 20 (4) 821 - 827 0965-7576 2012/09 [Refereed]
    This paper constructs a two-country model in which oligopolistic firms export goods and undertake cost-reducing R&D investment. Each country imposes tariffs. A decrease in the tariff rates in both countries decreases cost-reducing R&D investment.
  • Tadashi Morita
    JOURNAL OF ECONOMICS SPRINGER WIEN 100 (2) 117 - 140 0931-8658 2010/06 [Refereed]
    This paper constructs a North-South endogenous growth model where final good producers in the North determine whether they outsource the production of intermediate goods to the South or not. When the final good producers outsource the production of intermediate goods to the Northern firms, the price of intermediate goods is high, whereas the cost of outsourcing is low. On the other hand, when they outsource to the Southern firms, the price of intermediate goods is low, whereas the cost of outsourcing is high. Using this model, this paper analyzes not only steady state but also transition path. This paper investigates that, as the economy develops, the wage inequality between the North and the South widens and that the outsourcing location for the Northern final good producers switches from the North to the South.


  • Working hours decrease due to technological progress and increase due to urban agglomeration
    Takanori Ago; Tadashi Morita; Takatoshi Tabuchi; Kazuhiro Yamamoto  Vox: Research-based policy analysis and commentary from leading economists

Awards & Honors

  • 2022 The Sakashita Prize

Research Grants & Projects

  • 大企業と中小企業が混在しているときの産業政策に関する理論的研究
    Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2021/04 -2025/03 
    Author : 森田 忠士
  • 多国籍企業と政府間租税競争の理論経済分析
    MEXT:Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2017/04 -2021/03 
    Author : Tadashi Morita
  • 多国籍企業の行動が経済成長率や失業に与える影響についての理論的分析
    MEXT:Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2013/04 -2017/03 
    Author : Tadashi Morita


  • 2020 -2021/03  All-Kindai University support project against COVID-19 

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