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From Gibrat’s legacy to Gibrat’s fallacy. A Bayesian approach to study the growth of firms

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Author Info

  • Elena Cefis

    (Department of Economics, University of Bergamo)

  • Matteo Ciccarelli

    ()
    (Departamento de Fundamentos del Analisis Economico, Universidad de Alicante)

  • Luigi Orsenigo

    (Dipartimento di Ingegneria Meccanica e Industriale, University of Brescia)

Abstract

In this paper we investigate some properties of the patterns of firms’ growth. Several recent studies about this topic are based on some version of the so-called Gibrat’s Law, which assumes that firms’ growth is erratic. We aimed at testing Gibrat’s Law, as a first step towards a more systematic investigation of the patterns of firms’ growth. Using a Bayesian statistical framework that nests previous approaches, we find that: (i) there seems to be strong evidence against the Gibrat’s law on average, within or across industries; (ii) previous results are probably incorrect because they are based on models that do not exploit all information contained in a panel data set, particularly models that do not control for potential heterogeneity in the convergence rates; (iii) estimated steady states differ across units, and firm sizes and growth rates do not converge within the same industry to a common limiting distribution; (iv) there is only weak evidence of mean reversion, i.e. initial larger firms do not grow relatively slower than smaller firms. Differences in growth rates and in size steady state are firm-specific, rather than size-specific; (v) differences in growth rates do not seems to disappear over time.

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File URL: http://aisberg.unibg.it/bitstream/10446/175/1/WPEco06(2002)Cefis.pdf
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Bibliographic Info

Paper provided by University of Bergamo, Department of Economics in its series Working Papers with number 0206.

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Length: 44 pages
Date of creation: Oct 2002
Date of revision:
Handle: RePEc:brg:wpaper:0206

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Keywords: Gibrat’s law; panel data; heterogeneity; Bayesian estimation; Gibbs sampling;

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References

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Cited by:
  1. G. Bottazzi & E. Cefis & G. Dosi & A. Secchi, 2007. "Invariances and Diversities in the Patterns of Industrial Evolution: Some Evidence from Italian Manufacturing Industries," Small Business Economics, Springer, vol. 29(1), pages 137-159, June.

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