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TENDENCIES OF FIRM-SIZE DISTRIBUTIONS AND THE EVOLUTION OF ECONOMIC
DES DISTRIBUTIONS DE TAILLES D'ENTREPRISES ET EVOLUTION DES SYSTEMES
* and B.
: Stable skewed distributions of subsystem-Sizes are observed in a
variety of biological, sociological and economic systems (Zipf's law,
ranksize rule, Pareto-law). Based on a fundamental mathematical
property of Pareto distributions a theoretical explanation is proposed,
which applies to hierarchically organized systems in general. As
supporting evidence the analysis of empirical data concerning evolution
distributions of the 500 largest U.S. industrial corporations over the
last 25 years is presented.