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Consumer search and firm growth

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  • Erzo G. J. Luttmer

Abstract

This paper presents a simple model of search and matching between consumers and firms. The firm size distribution has a Pareto-like right tail if the population of consumers grows at a positive rate and the mean rate at which incumbent firms gain customers is also positive. This happens in equilibrium when entry is sufficiently costly. As entry costs grow without bound, the size distribution approaches Zipf's law. The slow rate at which the right tail of the size distribution decays and the 10% annual gross entry rate of new firms observed in the data suggest that more than a third of all consumers must switch from one firm to another during a given year. A substantially lower consumer switching rate can be inferred only if part of the observed firm entry rate is attributed to factors outside the model. The realized growth rates of large firms in the model are too smooth.

Suggested Citation

  • Erzo G. J. Luttmer, 2006. "Consumer search and firm growth," Working Papers 645, Federal Reserve Bank of Minneapolis.
  • Handle: RePEc:fip:fedmwp:645
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    References listed on IDEAS

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    Cited by:

    1. University of Minnesota & Erzo G.J. Luttmer, 2007. "New Goods and the Size Distribution of Firms," 2007 Meeting Papers 266, Society for Economic Dynamics.
    2. Erzo G.J. Luttmer, 2010. "Models of Growth and Firm Heterogeneity," Annual Review of Economics, Annual Reviews, vol. 2(1), pages 547-576, September.
    3. Erzo G. J. Luttmer, 2011. "On the Mechanics of Firm Growth," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 78(3), pages 1042-1068.
    4. Roldan-Blanco, Pau & Gilbukh, Sonia, 2021. "Firm dynamics and pricing under customer capital accumulation," Journal of Monetary Economics, Elsevier, vol. 118(C), pages 99-119.
    5. Morlacco, Monica & Zeke, David, 2021. "Monetary policy, customer capital, and market power," Journal of Monetary Economics, Elsevier, vol. 121(C), pages 116-134.

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