Updated on 2022/08/04

写真a

 
OKAMOTO Akira
 
Organization
Faculty of Humanities and Social Sciences Professor
Position
Professor
External link

Degree

  • Master (Economics) ( Kyoto University )

  • Ph.D. (Economics) ( Kyoto University )

Research Interests

  • 少子高齢化社会

  • 年金改革

  • 税制改革

  • 社会保障制度改革

  • 格差問題

  • 人口減少化社会

  • Economic Policy

  • Tax Reform

  • Social Security Reform

  • 経済政策

  • 階級社会

  • 社会の階層化

  • 所得階層の移動

  • 移民政策

  • 経済格差

  • 所得格差

  • 所得階層

  • 少子化対策

Research Areas

  • Humanities & Social Sciences / Economic policy

  • Humanities & Social Sciences / Economic policy

  • Humanities & Social Sciences / Public economics and labor economics

  • Humanities & Social Sciences / Public economics and labor economics

  • Humanities & Social Sciences / Money and finance

  • Humanities & Social Sciences / Economic policy

  • Humanities & Social Sciences / Economic policy

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Education

  • Kyoto University   経済学研究科  

    - 1997

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    Country: Japan

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  • Kyoto University    

    - 1997

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  • Kyoto University    

    - 1995

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  • Kyoto University   経済学研究科  

    - 1995

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    Country: Japan

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  • Kyoto University   経済学部  

    - 1989

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    Country: Japan

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  • Kyoto University    

    - 1989

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  • Kyoto University   博士(経済学)  

    2004.3

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Research History

  • - 岡山大学社会文化科学研究科 教授

    2007.10

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  • - Professor,Graduate School of Humanities and Social Sciences,Okayama University

    1997

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Professional Memberships

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Committee Memberships

  • 岡山県   税制懇話会 委員  

    2022.4 - 2024.3   

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    Committee type:Municipal

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Papers

  • Intergenerational earnings mobility and demographic dynamics: Welfare analysis of an aging Japan Reviewed

    Akira Okamoto

    Economic Analysis and Policy   74   76 - 104   2022.6

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    Authorship:Lead author, Last author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.eap.2022.01.006

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  • Immigration Policy and Demographic Dynamics: Welfare Analysis of an Aging Japan Reviewed

    Akira Okamoto

    Journal of the Japanese and International Economies   62   Article - 101168   2021.12

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

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  • Childcare Allowances and Public Pensions: Welfare and Demographic Effects in an Aging Japan Reviewed

    Akira Okamoto

    The B.E. Journal of Economic Analysis and Policy   20 ( 2 )   Article 20190067   2020.4

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

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  • WELFARE ANALYSIS OF PENSION REFORMS IN AN AGEING JAPAN Reviewed

    Akira Okamoto

    JAPANESE ECONOMIC REVIEW   64 ( 4 )   452 - 483   2013.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-BLACKWELL  

    This paper uses a computable general equilibrium model with overlapping generations to explore the effects of different public pension schemes on economic welfare, and intergenerational and intragenerational equity. Besides the benchmark case based on the 2004 public pension reform, the present paper considers two alternative reforms: financing the basic pension benefit through a consumption tax, and eliminating the earnings-related pension benefit. The simulation results suggest that even the consumption-tax financing of only the basic pension, namely, the combination of both reforms, might not improve overall economic welfare, although it increases economic output by inducing capital formation.

    DOI: 10.1111/jere.12002

    Web of Science

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  • Public Pension Reform in Japan Reviewed

    Akira Okamoto

    Economic Analysis and Policy   40 ( 2 )   179 - 208   2010

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    This paper aims to establish guidelines for public pension reform in Japan, using a numerical simulation approach. The paper introduces the example of a minimum guaranteed pension in the Swedish pension system and compares this with the basic pension in Japan's public pension system, with regard to methods of income redistribution through a public pension scheme. Simulation results show that the switch from the basic pension to the guaranteed pension does not always generate favorable results. If we consider a public pension program with the same scale as the current Japanese program, the highest level of social welfare is attained when a public pension system consists of only a basic pension and is financed by a consumption tax.

    DOI: 10.1016/S0313-5926(10)50024-9

    Scopus

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  • Optimal Tax Combination in an Aging Japan Reviewed

    OKAMOTO Akira

    International Economic Journal   21 ( 1 )   91 - 114   2007.3

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    Language:English   Publishing type:Research paper (scientific journal)  

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  • Simulating fundamental tax reforms in an aging Japan Reviewed

    Akira Okamoto

    Economic Systems Research   17 ( 2 )   163 - 185   2005.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    This paper studies in a quantitative way the macroeconomic and welfare effects of introducing progressive expenditure taxation, in a situation of the aging of the Japanese population. It undertakes a simulation analysis taking account of the general equilibrium effects of intragenerational inequality, which increases with a transition to an aging society. The simulation results suggest that progressive expenditure taxation has advantages over progressive labor income taxation on the grounds of efficiency and equity. Thus, a shift to progressive expenditure taxation can overcome the large welfare loss that would occur under the current tax system as Japan ages. © 2005 Taylor &amp
    Francis Group Ltd.

    DOI: 10.1080/09535310500114911

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  • Simulating progressive expenditure taxation in an aging Japan Reviewed

    A Okamoto

    JOURNAL OF POLICY MODELING   27 ( 3 )   309 - 325   2005.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE INC  

    This paper investigates the quantitative effects of tax reform from progressive labor income taxation toward progressive expenditure taxation on efficiency and equity in Japan, a society with an aging population. To analyze this problem, we employ a comparative steady state simulation approach for an extended life-cycle general equilibrium model of overlapping generations with different lifetime earnings ability. The simulation results suggest some advantages of a new tax system of progressive expenditure taxation. (c) 2005 Society for Policy Modeling. Published by Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.jpolmod.2004.08.011

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  • コロナ危機と地方創生 ―地域の持続可能性を評価する新たな指標― Invited

    岡本 章

    岡山大学産業経営研究会研究報告書   第55集   1 - 32   2022.5

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  • Silver Democracy and Electoral System: Political Feasibility of Policy Reform Plans in an Aging Japan

    OKAMOTO Akira

    Okayama Economic Review   51 ( 2/3 )   123 - 129   2020.3

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

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  • Simulating Public Pension Reforms in an Aging Japan: Welfare Analysis with LSRA Transfers Invited

    岡本 章

    Public Policy Review   9 ( 4 )   597 - 632   2013.9

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  • 少子高齢・人口減少社会における公的年金改革 ―LSRA による所得移転を含む厚生分析 ― Invited

    岡本 章

    財務省財務総合政策研究所 『フィナンシャル・レビュー』   ( 115 )   23 - 52   2013.6

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  • Tax Policy in Aging Japan Reviewed

    Okamoto Akira

    Journal of International Economic Studies   23   43 - 58   2009.3

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    Language:English   Publisher:The Institute of Comparative Economic Studies, Hosei University  

    CiNii Article

    CiNii Books

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  • 日本の公的年金改革 Invited

    岡本 章

    日本財政学会叢書 『財政研究』(日韓特別セッション)   4   92 - 102   2008.10

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  • 少子高齢化と国民負担率 Invited

    岡本 章

    橘木俊詔編著 『政府の大きさと社会保障制度』   第2章   67 - 94   2007.6

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  • 基礎年金・最低保障年金の分析 Invited

    岡本章, 島俊彦

    橘木俊詔編著 『政府の大きさと社会保障制度』   第4章   121 - 153   2007.6

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  • 国民の受益・負担と政府の大きさ Invited

    橘木俊詔, 岡本章, 川出真清, 畑農鋭矢, 宮里尚三

    橘木俊詔編著『政府の大きさと社会保障制度』   第1章   31 - 66   2007.6

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  • 望ましい財源調達手段 Invited

    橘木俊詔, 岡本章, 川出真清, 畑農鋭矢, 宮里尚三, 島俊彦, 石原章史

    橘木俊詔編著『政府の大きさと社会保障制度』   第3章   95 - 120   2007.6

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  • 少子高齢化と租税政策 Invited

    岡本 章

    橘木俊詔編著 『日本経済の実証分析』   第5章   91 - 116   2007.3

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  • An Optimal Rate of the National Burden in an Aging Japan Reviewed

    Okamoto Akira

    The Kyoto Economic Review   75 ( 1 )   13 - 34   2006.6

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    Language:English   Publisher:Graduate School of Economics, Kyoto University  

    This paper examines an optimal rate of the national burden to establish guidelines for fiscal reform in Japan&rsquo;s graying society. The paper looks at Japanese tax and social security systems through an extended life-cycle general equilibrium simulation model. It explicitly considers the benefits that the government provides to households, which enables us to comprehensively evaluate the balance between benefits and burdens. Simulation results show that an optimal rate of the national burden is high when households put a great utility weight on the benefits coming from public services, and that it is low when the degree of publicness of government expenditure is high. The results also suggest that an optimal rate of the national burden would rise as Japan ages and may exceed 50% during the rapid aging of its population.<br>

    DOI: 10.11179/ker.75.13

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  • Integration of tax and social security systems - On the financing methods of a public pension scheme in a pay-as-you-go system Invited

    A Okamoto, T Tachibanaki

    SOCIAL SECURITY REFORM IN ADVANCED COUNTRIES   Chapter 7   132 - 160   2002

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:ROUTLEDGE  

    This chapter explores whether or not the contributions to public pension scheme in the pay-as-you-go system should be substituted by general taxes, e.g. a progressive labor income tax or a consumption tax. The chapter also investigates whether or not such possible integration of tax and social security systems is desirable from the aspects of both efficiency and equity. To analyze the problem, we adopt an extended lifecycle general equilibrium model of overlapping generations with heterogeneity in the ability of labor supply, using the household expenditure survey data. The simulation results indicate that a progressive expenditure tax with full integration is the most desirable policy.

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Books

  • コロナ危機と地方創生 ―地域の持続可能性を評価する新たな指標―

    岡本 章( Role: Sole author)

    『岡山大学産業経営研究会研究報告書』第55集  2022.5 

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    Responsible for pages:1-32   Language:Japanese

  • 年金給付削減は政治的に実現できるのか

    岡本 章( Role: Sole author)

    中央公論新社『中央公論』  2016.7 

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    Total pages:第130巻第7号   Responsible for pages:42-54   Book type:General book, introductory book for general audience

  • 日本の公的年金改革

    岡本 章( Role: Sole author ,  日韓特別セッション)

    日本財政学会叢書 『財政研究』 第4巻, 有斐閣, 92-102.  2008 

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  • 政府の大きさと社会保障制度 ―国民の受益・負担からみた分析と提言―

    岡本 章(分担執筆)

    東京大学出版会  2007 

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  • 日本経済の実証分析 ―失われた10年を乗り越えて―

    岡本 章( Role: Contributor)

    東洋経済新報社  2007 

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  • Tax Policy for Aging Societies: Lessons from Japan

    岡本 章

    Springer  2004 

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  • Tax and Social Security Reforms in an Aging Japan

    岡本 章

    Okayama University Economic Research Series No. 29  2003 

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MISC

  • 新型コロナウイルスと人口減少 Invited

    岡本 章

    政策ブログ『財政・社会保障研究会』 日本経済研究センター   2021.10

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    Authorship:Lead author, Last author, Corresponding author  

  • 実質賃金が増える政府債務の規模 Invited

    岡本 章

    政策ブログ『財政・社会保障研究会』 日本経済研究センター   2021.6

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    Authorship:Lead author, Last author, Corresponding author  

  • 所得階層の移動促進、社会全体の損失回避を Invited

    岡本 章

    政策ブログ『財政・社会保障研究会』 日本経済研究センター   2019.6

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    Authorship:Lead author, Last author, Corresponding author  

  • シルバー民主主義を考える:選挙制度の大胆改革急げ Invited

    岡本 章

    日本経済新聞『経済教室』   朝刊 ( 17面 )   2017.5

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  • 「狛江市議会に世代別選挙区制度を」提案者に聞く Invited

    内山惠一・岡本章

    中央公論新社『中央公論』   第130巻第7号 ( 54-57 )   2016.7

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  • Foreword to Feature Articles "Deployable Radiator and Related Thermal and Structure Technologies"

    OKAMOTO Akira

    54 ( 635 )   343 - 343   2006.12

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  • Introduction of Progressive Expenditure Taxation to Japan

    Okamoto, A

    Okayama Economic Review   2005

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  • Comments on “Effect of Economic Crisis on Income Distribution in Korea” by Professor Jun Young Kim (Sungkyunkwan University, Korea)

    Okamoto, A

    「ラウンドテーブル:財政の効率性・公平性について」報告書 第4章 内閣府経済社会総合研究所   2002

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  • 所得分布と高齢化社会における税制改革

    岡本章

    岡山大学経済学会雑誌   2000

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  • 労働異質性と高齢化社会における税制改革 ―累進税制の選択と資産格差への影響―

    岡本章

    岡山大学経済学会雑誌   2000

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  • アンケート調査にみる郵便貯金の役割

    岡本章

    郵便貯金に関する特別委託研究「郵便貯金と地域社会に関する研究」   1998

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  • 社会保障負担は“累進消費税”の導入で賄え(橘木俊詔との共著)

    「週刊エコノミスト」毎日新聞社   3月18日号、76-79   1997

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  • 高齢化社会における利子所得税のディストーション効果について

    京都大学経済論叢   第157巻第4号 16-29・第158巻第2号、58-74   1996

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Presentations

  • Simulating the Comprehensive Effects of Intergenerational Earnings Mobility in an Aging Japan Invited

    Akira Okamoto

    The International Symposium on Business and Economic Studies  2019.11.15 

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    Language:English   Presentation type:Oral presentation (general)  

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  • The Optimum Quantity of Debt for a Depopulating and Aging Japan: Welfare Level or Future Population?

    Akira Okamoto

    The 13th Irvine-Japan Conference on Public Policy, Irvine  2017.2.3 

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    Language:English   Presentation type:Oral presentation (general)  

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  • Child Allowances and Public Pensions: Welfare Effects and Political Feasibility of Reforms in a "Silver Democracy"

    International Symposium on "Demography and Pensions"  2015 

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  • Child Allowances and Public Pension: Welfare Effects of their Reforms and Political Feasibility under the "Silver Democracy"

    日本経済学会春季大会  2015 

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  • Child Allowances and Public Pension: Welfare Effects of their Reforms and Political Feasibility under the "Silver Democracy"

    関西公共経済学研究会  2015 

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  • Pareto-Improving Pension Reform in an Aging Japan

    The 64th Annual Meeting of the Japan Fiscal Science Association, Japan-Korea Special Session  2009 

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  • Public Pension Reform in Japan: Basic Pension or Minimum Guaranteed Pension?

    The 64th Annual Meeting of the Japan Fiscal Science Association, Japan-Korea Special Session  2007 

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  • Optimal Tax Combination in an Aging Japan

    The 62nd Congress of the International Institute of Public Finance  2006 

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  • Optimal Tax Combination in an Aging Japan

    International Conference on “International Research Project on Aging (Japan, China, Korea)  2006 

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  • Optimal National Burden Rate and an Aging Japan

    Spring Seminar of Department of Economics at the University of Wisconsin-Milwaukee  2006 

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  • 少子高齢化と租税政策

    淡路島コンファレンス『日本経済はどのように機能しているか』(京都大学COEプロジェクト)  2006 

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  • Optimal National Burden Rate and an Aging Japan

    日本財政学会第62回大会  2005 

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  • Optimal National Burden Rate and an Aging Japan

    The 61st Congress of the International Institute of Public Finance  2005 

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  • Inheritance Taxes and Tax Reforms in an Aging Japan

    International Conference on the "International Research Project on Aging (Japan, China, and Korea)"  2004 

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  • Simulating Structural Tax Reforms in Aging Japan

    2004年度日本経済学会秋季大会  2004 

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  • Within-cohort Inequality and Tax Reforms in Aging Japan

    "International Forum on Tax Reforms in Japan," Economic and Social Research Institute (ESRI), Cabinet Office  2002 

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  • Within-Cohort Inequality and Tax Reforms in Aging Japan

    "International Forum on Tax Reforms in Japan" organized by Economic and Social Research Institute (ESRI)  2002 

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  • Within-Cohort Inequality and Tax Reforms in Aging Japan

    International Forum on Tax Reforms in Japan” organized by Economic and Social Research Institute (ESRI)  2002 

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  • ライフサイクル一般均衡モデルによるシミュレーション分析

    国立社会保障・人口問題研究所:社会保障に関するOLGモデル・ワークショップ  2001 

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  • 所得税と支出税

    経済産業省政策局 第3回財政研究会  2001 

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  • ライフサイクル一般均衡モデルによるシミュレーション分析

    社会保障に関するOLGモデル・ワークショップ, 国立社会保障・人口問題研究所  2001 

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  • Integration of Tax and Social Security Systems: On the Financing Methods of a Public Pension Scheme in Pay-as-You-Go System

    2000 Annual Meeting of the Japan Fiscal Science Association  2000 

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  • Progressive Expenditure Taxation in Aging Japan

    2000 Annual Meeting of the Japanese Economic Association  2000 

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  • Integration of Tax and Social Security Systems

    2000 Annual Meeting of the Japan Fiscal Science Association  2000 

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  • Integration of Social Security and Tax Systems

    International Conference on "Social Security Reform in Advanced Countries"  1999 

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  • Integration of Social Security and Tax Systems

    International Conference on "Social Security Reform in Advanced Countries"  1999 

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  • 経済の動向 ―試される日本経済の変革力―

    岡山県自治研修所  1998 

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Awards

  • 「有意義な審査意見を付した科研費審査委員」として表彰される

    2016   日本学術振興会  

    岡本 章

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  • 安倍フェロー

    2015  

    岡本 章

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  • Fulbright Award

    2010   Fulbright  

    OKAMOTO Akira

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Class subject in charge

  • Graduation Research Seminar (2021academic year) 1st and 2nd semester  - その他

  • Graduation Research Seminar (2021academic year) 3rd and 4th semester  - その他

  • Seminar (2021academic year) 1st and 2nd semester  - 月7~8

  • Seminar (2021academic year) 3rd and 4th semester  - 月7~8

  • National Fiscal Policy (2021academic year) Prophase  - 水5

  • Basic Seminar (2021academic year) Fourth semester  - 火7~8

  • Challenge Seminar 2(Division of Economic Theory and Policy) (2021academic year) Prophase  - その他

  • Public Finance (2021academic year) Prophase  - 水5

  • Public Finance (2021academic year) 1st and 2nd semester  - 月9

  • Public Finance(Common Subject) (2021academic year) 1st and 2nd semester  - 月9

  • Public Finance I (2021academic year) 1st and 2nd semester  - 火1~2

  • Public Finance I (2021academic year) 1st and 2nd semester  - 火1~2

  • Public Finance II (2021academic year) 3rd and 4th semester  - 火5~6

  • Public Finance II (2021academic year) 3rd and 4th semester  - 火5~6

  • Public Finance Ia (2021academic year) 1st semester  - 火1~2

  • Public Finance Ib (2021academic year) Second semester  - 火1~2

  • Seminar on Public Finance (2021academic year) Late  - 水5

  • Fiscal Policy (2021academic year) special  - その他

  • Seminar on Fiscal Policy 1 (2021academic year) special  - その他

  • Seminar on Fiscal Policy 2 (2021academic year) special  - その他

  • Capital Market & Investment (2021academic year) 1st and 2nd semester  - 水7~8

  • Graduation Research Seminar (2020academic year) 1st and 2nd semester  - その他

  • Graduation Research Seminar (2020academic year) 3rd and 4th semester  - その他

  • Seminar (2020academic year) 1st and 2nd semester  - 火7,火8

  • Seminar (2020academic year) 3rd and 4th semester  - 月7,月8

  • National Fiscal Policy (2020academic year) Prophase  - 水5

  • Basic Seminar (2020academic year) 1st semester  - 月7,月8

  • Basic Seminar (2020academic year) Third semester  - 火7,火8

  • Basic Seminar (2020academic year) Fourth semester  - 火7,火8

  • Current Topics on Local Public Sector (2020academic year) 3rd and 4th semester  - 水7

  • Challenge Seminar 1(Division of Economic Theory and Policy) (2020academic year) Late  - その他

  • Public Finance (2020academic year) 3rd and 4th semester  - 火9

  • Public Finance (2020academic year) Prophase  - 水5

  • Public Finance II (2020academic year) Second semester  - 火5,火6

  • Seminar on Public Finance (2020academic year) Late  - 水5

  • Public Finance I (2020academic year) 1st semester  - 火1,火2

  • Fiscal Policy (2020academic year) special  - その他

  • Seminar on Fiscal Policy 1 (2020academic year) special  - その他

  • Seminar on Fiscal Policy 2 (2020academic year) special  - その他

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Social Activities

  • 安倍フェローになろう

    Role(s):Lecturer

    国際交流基金日米センター  安倍フェローシップ・プログラム 申請説明会  2019.7.11

  • 人口減少・少子高齢化と日本の財政

    Role(s):Lecturer

    岡山大学  経済学部公開講座「持続可能な社会と制度」  2019.6.15

Media Coverage

  • シルバー民主主義の現状 格差解消に向けて検討すべきポイントとは TV or radio program

    FM各局   JFN系列のラジオ番組「OH! HAPPY MORNING」  ラジオ番組出演  2022.6.29

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    Author:Myself 

  • 新型コロナと未来 ―私たちはどう暮らす― TV or radio program

    瀬戸内海放送(5ch)  「報・道・力」  テレビ出演(スタジオ生出演)  2020.12.26

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    Author:Myself 

  • コロナ危機と地方創生 TV or radio program

    山陽放送(6ch)  RSK Evening News  テレビ出演(VTR)  2020.9.1

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    Author:Myself 

  • 消費増税から1ヵ月:ポイント還元など増税対策に消費者は? TV or radio program

    テレビせとうち(7ch)  TSC news 5  テレビ出演(VTR)  2019.11.1

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    Author:Myself 

  • 若者、なぜ選挙に行かない? 政治、発信や接点不足 Newspaper, magazine

    日本経済新聞 朝刊(27面)  日本経済新聞  コメント掲載  2019.7.15

  • 「地方創生」『ニュースこの1年』 TV or radio program

    西日本放送(4ch)  RNC news every.  テレビ出演(VTR)  2015.12.23

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