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Factors for Widening Income Inequality

Research Project

Project/Area Number 21730178
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Economic statistics
Research InstitutionOsaka University of Economics

Principal Investigator

YAMAGUCHI Masao  Osaka University of Economics, 経済学部, 准教授 (50511002)

Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords所得格差 / 賃金格差 / 人口の高齢化 / 要因分解 / 平均対数偏差 / 学歴 / 企業規模 / 低所得化
Research Abstract

Using anonymous data from the "National Consumption Survey," we found the following result. The real equivalent income distribution of households with two or more individuals began to skew toward the lower income groups beginning in 1994, with the proportion of households with an income of 3.2 million yen or less rising slightly from 1994 to 1999 and the rise becoming more pronounced during the period 1999-2004.The same things hold true for the income distribution under 60. The income inequality within the working population aged below 60, which has been widening since 1994, was hardly affected by population aging, with an increase in disparities within each age group of the working population. This widening income gap and shift toward lower incomes indicates the necessity to reconsider Japan's wage and social security systems.

Report

(3 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • Research Products

    (8 results)

All 2011 2010 2009 Other

All Journal Article (4 results) Presentation (2 results) Remarks (2 results)

  • [Journal Article] 所得格差拡大の要因:人口の高齢化の再検討2011

    • Author(s)
      山口雅生
    • Journal Title

      Osaka University of Economics Working Paper Series

      Volume: No.2011-2 Pages: 1-20

    • Related Report
      2010 Annual Research Report
  • [Journal Article] 年齢・学歴・企業規模と賃金格差:1994-20092011

    • Author(s)
      山口雅生
    • Journal Title

      Osaka University of Economics Working Paper Series

      Volume: No.2011-3 Pages: 1-22

    • Related Report
      2010 Annual Research Report
  • [Journal Article] 所得格差拡大の要因:人口の高齢化の再検討

    • Author(s)
      山口雅生
    • Journal Title

      Osaka University of Economics Working Paper Series No.2011-2

      Pages: 1-20

    • Related Report
      2010 Final Research Report
  • [Journal Article] 年齢・学歴・企業規模と賃金格差:1994-2009

    • Author(s)
      山口雅生
    • Journal Title

      Osaka University of Economics Working Paper Series No.2011-3

      Pages: 1-22

    • Related Report
      2010 Final Research Report
  • [Presentation] 所得格差拡大の要因:非就業者と就業者を中心に2010

    • Author(s)
      山口雅生
    • Organizer
      日本応用経済学会秋季大会
    • Place of Presentation
      高崎経済大学
    • Year and Date
      2010-11-14
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] 日本の世帯所得格差2009

    • Author(s)
      山口雅生
    • Organizer
      現代経済学研究会
    • Place of Presentation
      福山市役所靹支所会議室(広島県)
    • Year and Date
      2009-08-30
    • Related Report
      2009 Annual Research Report
  • [Remarks] ホームページ等

    • URL

      http://www7.ocn.ne.jp/~wish/

    • Related Report
      2010 Final Research Report
  • [Remarks]

    • URL

      http://www2.osaka-ue.ac.jp/CGI/view.cgi?seq=893

    • Related Report
      2010 Annual Research Report

URL: 

Published: 2009-04-01   Modified: 2016-04-21  

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