TY  - JOUR
UR  - http://stacks.iop.org/0295-5075/67/i=3/a=498
JF  - EPL (Europhysics Letters)
IS  - 3
AV  - none
TI  - Statistical properties of business firms structure and growth
Y1  - 2004///
N2  - We analyze a database comprising quarterly sales of 55624 pharmaceutical products commercialized by 3939 pharmaceutical firms in the period 1992-2001. We study the probability density function (PDF) of growth in firms and product sales and find that the width of the PDF of growth decays with the sales as a power law with exponent β = 0.20 ± 0.01. We also find that the average sales of products scales with the firm sales as a power law with exponent α = 0.57 ± 0.02. And that the average number products of a firm scales with the firm sales as a power law with exponent γ = 0.42 ± 0.02. We compare these findings with the predictions of models proposed till date on growth of business firms.
A1  - Pammolli, Fabio
A1  - Matia, Kaushik
A1  - Fu, Dongfeng
A1  - Buldyrev, Sergey V.
A1  - Riccaboni, Massimo
A1  - Stanley, H. Eugene
SN  - 0295-5075
PB  - EDP Sciences
N1  -   PACS:  05.45.Tp Time series analysis

    05.40.Fb Random walks and Levy flights

    89.90.+n Other topics in areas of applied and interdisciplinary physics (restricted to new topics in section 89)

ID  - eprints650
VL  - 67
ER  -