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Dynamics of Markups, Concentration, and Product Span

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  • Elhanan Helpman
  • Benjamin Niswonger

Abstract

We develop a model with a finite number of multiproduct firms together with a continuum of single-product firms and study the dynamics that arise from product innovation. Consistent with the available evidence, the model predicts rising markups and concentration and a declining labor share. Our dynamics predict the possibility of an inverted-U relationship between labor productivity and product span, for which we provide suggestive evidence. In the optimal allocation, product span and labor productivity are strictly positively related. We also characterize optimal policies for these types of sectors.

Suggested Citation

  • Elhanan Helpman & Benjamin Niswonger, 2022. "Dynamics of Markups, Concentration, and Product Span," American Economic Journal: Macroeconomics, American Economic Association, vol. 14(3), pages 42-81, July.
    • Handle: RePEc:aea:aejmac:v:14:y:2022:i:3:p:42-81
    DOI: 10.1257/mac.20200378
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    1. Ken-Ichi Shimomura & Jacques-François Thisse, 2012. "Competition among the big and the small," RAND Journal of Economics, RAND Corporation, vol. 43(2), pages 329-347, June.
    2. Andrew Atkeson & Ariel Burstein, 2008. "Pricing-to-Market, Trade Costs, and International Relative Prices," American Economic Review, American Economic Association, vol. 98(5), pages 1998-2031, December.
    3. Gene M. Grossman & Elhanan Helpman, 1991. "Quality Ladders in the Theory of Growth," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 58(1), pages 43-61.
    4. Tor Jakob Klette & Samuel Kortum, 2004. "Innovating Firms and Aggregate Innovation," Journal of Political Economy, University of Chicago Press, vol. 112(5), pages 986-1018, October.
    5. 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.
    6. Parenti, Mathieu, 2018. "Large and small firms in a global market: David vs. Goliath," Journal of International Economics, Elsevier, vol. 110(C), pages 103-118.
    7. Matthias Kehrig & Nicolas Vincent, 2019. "Good Dispersion, Bad Dispersion," NBER Working Papers 25923, National Bureau of Economic Research, Inc.
    8. Aghion, Philippe & Howitt, Peter, 1992. "A Model of Growth through Creative Destruction," Econometrica, Econometric Society, vol. 60(2), pages 323-351, March.
    9. Germán Gutiérrez & Thomas Philippon, 2019. "The Failure of Free Entry," NBER Working Papers 26001, National Bureau of Economic Research, Inc.
    10. Philippe Aghion & Antonin Bergeaud & Timo Boppart & Peter J Klenow & Huiyu Li, 2023. "A Theory of Falling Growth and Rising Rents," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 90(6), pages 2675-2702.
    11. David Autor & David Dorn & Lawrence F Katz & Christina Patterson & John Van Reenen, 2020. "The Fall of the Labor Share and the Rise of Superstar Firms [“Automation and New Tasks: How Technology Displaces and Reinstates Labor”]," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(2), pages 645-709.
    12. Dan Cao & Erick Sager & Henry Hyatt & Toshihiko Mukoyama, 2019. "Firm Growth through New Establishments," 2019 Meeting Papers 1484, Society for Economic Dynamics.
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    More about this item

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • D33 - Microeconomics - - Distribution - - - Factor Income Distribution
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • J24 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Human Capital; Skills; Occupational Choice; Labor Productivity
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives

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