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A look at the relationship between industrial dynamics and aggregate fluctuations

  • Domenico Delli Gatti
  • Edoardo Gaffeo


  • Mauro Gallegati

The firmly established evidence of right-skewness of the firms’ size distribution is generally modelled recurring to some variant of the Gibrat’s Law of Proportional Effects. In spite of its empirical success, this approach has been harshly criticized on a theoretical ground due to its lack of economic contents and its unpleasant long-run implications. In this chapter we show that a right-skewed firms’ size distribution, with its upper tail scaling down as a power law, arises naturally from a simple choice-theoretic model based on financial market imperfections and a wage setting relationship. Our results rest on a multi-agent generalization of the prey-predator model, firstly introduced into economics by Richard Goodwin forty years ago.

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Paper provided by Department of Economics, University of Trento, Italia in its series Department of Economics Working Papers with number 0803.

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Date of creation: 2008
Date of revision:
Handle: RePEc:trn:utwpde:0803
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