101 citations
4 papers
The Size Variance Relationship of Business Firm Growth Rates
Massimo Riccaboni, Fabio Pammolli, Sergey V. Buldyrev +2
The relationship between the size and the variance of firm growth rates is known to follow an approximate power-law behavior where is the firm size and $β…
Betweenness Centrality of Fractal and Non-Fractal Scale-Free Model Networks and Tests on Real Networks
Maksim Kitsak, Shlomo Havlin, Gerald Paul +3
We study the betweenness centrality of fractal and non-fractal scale-free network models as well as real networks. We show that the correlation between degree and betweenness centr…
A Generalized Preferential Attachment Model for Business Firms Growth Rates: II. Mathematical Treatment
S. V. Buldyrev, F. Pammolli, M. Riccaboni +4
We present a preferential attachment growth model to obtain the distribution of number of units in the classes which may represent business firms or other socio-economic…
A Generalized Preferential Attachment Model for Business Firms Growth Rates: I. Empirical Evidence
Fabio Pammolli, Dongfeng Fu, S. V. Buldyrev +4
We introduce a model of proportional growth to explain the distribution of business firm growth rates. The model predicts that is Laplace in the central part and depi…