A generalized preferential attachment model for business firms growth rates

@article{Buldyrev2006AGP,
  title={A generalized preferential attachment model for
 business firms growth rates},
  author={Sergey V. Buldyrev and Fabio Pammolli and Massimo Riccaboni and Kazuko Yamasaki and Dongfeng Fu and Kaushik Matia and Harry Eugene Stanley},
  journal={The European Physical Journal B},
  year={2006},
  volume={57},
  pages={131-138}
}
Abstract.We present a preferential attachment growth model to obtain the distribution P(K) of number of units K in the classes which may represent business firms or other socio-economic entities. We found that P(K) is described in its central part by a power law with an exponent ϕ = 2+b/(1-b) which depends on the probability of entry of new classes, b. In a particular problem of city population this distribution is equivalent to the well known Zipf law. In the absence of the new classes… 
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