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Piketty’s Elasticity of Substitution: A Critique

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  • Gregor Semieniuk
Abstract
This article examines Thomas Piketty’s explanation of a falling wage share. Piketty explains rising income inequality between labor and capital as a result of one parameter of a production function: an elasticity of substitution, σ, between labor and capital greater than one. This article reviews Piketty’s elasticity argument, which relies on a non-standard definition of capital. In light of the theory of land rent, it discusses why the non-standard capital definition is a measure of wealth, not capital and is problematic for estimating elasticities. It then presents simple long-run estimates of σ in constant elasticity of substitution functions for Piketty’s data as well as for a subset of his capital measure that comes closer to the standard definition of productive capital. The estimation results cast doubt on Piketty’s hypothesis that σ is greater than one.

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  • Gregor Semieniuk, 2017. "Piketty’s Elasticity of Substitution: A Critique," Review of Political Economy, Taylor & Francis Journals, vol. 29(1), pages 64-79, January.
    • Handle: RePEc:taf:revpoe:v:29:y:2017:i:1:p:64-79
    DOI: 10.1080/09538259.2016.1244916
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    16. Duncan K. Foley, 2013. "Rethinking Financial Capitalism and the “Information†Economy," Review of Radical Political Economics, Union for Radical Political Economics, vol. 45(3), pages 257-268, September.
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    2. Sebastian Gechert & Tomas Havranek & Zuzana Irsova & Dominika Kolcunova, 2022. "Measuring Capital-Labor Substitution: The Importance of Method Choices and Publication Bias," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 45, pages 55-82, July.
    3. Michael Knoblach & Fabian Stöckl, 2020. "What Determines The Elasticity Of Substitution Between Capital And Labor? A Literature Review," Journal of Economic Surveys, Wiley Blackwell, vol. 34(4), pages 847-875, September.
    4. Akaev, Askar & Devezas, Tessaleno & Ichkitidze, Yuri & Sarygulov, Askar, 2021. "Forecasting the labor intensity and labor income share for G7 countries in the digital age," Technological Forecasting and Social Change, Elsevier, vol. 167(C).
    5. Satya Prasad Padhi, 2021. "Employment dynamics, increasing returns and Marx's falling rate of profit," PSL Quarterly Review, Economia civile, vol. 74(298), pages 219-245.
    6. Hegelund, Erik & Taalbi, Josef, 2023. "What determines unemployment in the long run? Band spectrum regression on ten countries 1913–2016," Structural Change and Economic Dynamics, Elsevier, vol. 64(C), pages 144-167.
    7. Luca Zamparelli, 2017. "Wealth Distribution, Elasticity of Substitution and Piketty: An ‘Anti-Dual’ Pasinetti Economy," Metroeconomica, Wiley Blackwell, vol. 68(4), pages 927-946, November.
    8. Marwil Jhonatan Dávila Fernádez & José Luis Oreiro, 2016. "Capital In The Twenty First Century: Reinterpretando A Contradição Fundamental Do Capitalismo," Anais do XLIII Encontro Nacional de Economia [Proceedings of the 43rd Brazilian Economics Meeting] 096, ANPEC - Associação Nacional dos Centros de Pós-Graduação em Economia [Brazilian Association of Graduate Programs in Economics].
    9. Dong–Min Rieu & Hyun Woong Park, 2018. "Unproductive Activities and the Rate of Surplus Value at the Industry Level in Korea, 1995–2015," UMASS Amherst Economics Working Papers 2018-07, University of Massachusetts Amherst, Department of Economics.
    10. Jackson, Tim & Victor, Peter A., 2016. "Does slow growth lead to rising inequality? Some theoretical reflections and numerical simulations," Ecological Economics, Elsevier, vol. 121(C), pages 206-219.
    11. Gechert, Sebastian & Havranek, Tomas & Irsova, Zuzana & Kolcunova, Dominika, 2019. "Death to the Cobb-Douglas Production Function? A Quantitative Survey of the Capital-Labor Substitution Elasticity," EconStor Preprints 203136, ZBW - Leibniz Information Centre for Economics.
    12. Kumar, Rishabh & Schoder, Christian & Radpour, Siavash, 2018. "Demand driven growth and capital distribution in a two class model with applications to the United States," Structural Change and Economic Dynamics, Elsevier, vol. 47(C), pages 1-8.
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    14. Sebastian Gechert & Tomas Havranek & Zuzana Irsova & Dominika Kolcunova, 2022. "Measuring Capital-Labor Substitution: The Importance of Method Choices and Publication Bias," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 45, pages 55-82, July.

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    JEL classification:

    • B12 - Schools of Economic Thought and Methodology - - History of Economic Thought through 1925 - - - Classical (includes Adam Smith)
    • E01 - Macroeconomics and Monetary Economics - - General - - - Measurement and Data on National Income and Product Accounts and Wealth; Environmental Accounts
    • E25 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Aggregate Factor Income Distribution

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