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Not a Typical Firm: Capital–Labor Substitution and Firms' Labor Shares

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  • Joachim Hubmer
  • Pascual Restrepo

Abstract

The US labor share has declined, especially in manufacturing and retail. Yet the labor share of a typical firm in these sectors has risen. We introduce a model where firms incur fixed costs to automate tasks. A decline in the price of capital goods used for automation reproduces the observed patterns: large firms automate tasks, reducing the aggregate labor share, while the median firm continues to operate a labor-intensive technology. When calibrating the automation fixed costs to match the observed adoption heterogeneity, the model generates the aggregate and firm-level facts quantitatively in response to lower capital prices, especially in manufacturing.

Suggested Citation

  • Joachim Hubmer & Pascual Restrepo, 2026. "Not a Typical Firm: Capital–Labor Substitution and Firms' Labor Shares," American Economic Journal: Macroeconomics, American Economic Association, vol. 18(2), pages 34-71, April.
    • Handle: RePEc:aea:aejmac:v:18:y:2026:i:2:p:34-71
    DOI: 10.1257/mac.20230325
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    1. Kimball, Miles S, 1995. "The Quantitative Analytics of the Basic Neomonetarist Model," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 27(4), pages 1241-1277, November.
    2. Olley, G Steven & Pakes, Ariel, 1996. "The Dynamics of Productivity in the Telecommunications Equipment Industry," Econometrica, Econometric Society, vol. 64(6), pages 1263-1297, November.
    3. Lee, Yoonsoo & Mukoyama, Toshihiko, 2015. "Entry and exit of manufacturing plants over the business cycle," European Economic Review, Elsevier, vol. 77(C), pages 20-27.
    4. Jan De Loecker & Jan Eeckhout & Gabriel Unger, 2020. "The Rise of Market Power and the Macroeconomic Implications [“Econometric Tools for Analyzing Market Outcomes”]," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(2), pages 561-644.
    5. Peter J. Klenow & Jonathan L. Willis, 2016. "Real Rigidities and Nominal Price Changes," Economica, London School of Economics and Political Science, vol. 83(331), pages 443-472, July.
    6. David Rezza Baqaee & Emmanuel Farhi, 2020. "Productivity and Misallocation in General Equilibrium," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(1), pages 105-163.
    7. repec:ucp:bknber:9780226304557 is not listed on IDEAS
    8. Daniel A. Ackerberg & Kevin Caves & Garth Frazer, 2015. "Identification Properties of Recent Production Function Estimators," Econometrica, Econometric Society, vol. 83, pages 2411-2451, November.
    9. DiCecio, Riccardo, 2009. "Sticky wages and sectoral labor comovement," Journal of Economic Dynamics and Control, Elsevier, vol. 33(3), pages 538-553, March.
    10. Ryan A. Decker & John Haltiwanger & Ron S. Jarmin & Javier Miranda, 2020. "Changing Business Dynamism and Productivity: Shocks versus Responsiveness," American Economic Review, American Economic Association, vol. 110(12), pages 3952-3990, December.
    11. Robert J. Gordon, 1990. "The Measurement of Durable Goods Prices," NBER Books, National Bureau of Economic Research, Inc, number gord90-1, October.
    12. Hopenhayn, Hugo A, 1992. "Entry, Exit, and Firm Dynamics in Long Run Equilibrium," Econometrica, Econometric Society, vol. 60(5), pages 1127-1150, September.
    13. Joachim Hubmer, 2023. "The Race Between Preferences and Technology," Econometrica, Econometric Society, vol. 91(1), pages 227-261, January.
    14. Bond, Steve & Hashemi, Arshia & Kaplan, Greg & Zoch, Piotr, 2021. "Some unpleasant markup arithmetic: Production function elasticities and their estimation from production data," Journal of Monetary Economics, Elsevier, vol. 121(C), pages 1-14.
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    More about this item

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • D33 - Microeconomics - - Distribution - - - Factor Income Distribution
    • E25 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Aggregate Factor Income Distribution
    • L60 - Industrial Organization - - Industry Studies: Manufacturing - - - General
    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D

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