Pammolli, Fabio and Matia, Kaushik and Fu, Dongfeng and Buldyrev, Sergey V. and Riccaboni, Massimo and Stanley, H. Eugene Statistical properties of business firms structure and growth. EPL (Europhysics Letters), 67 (3). p. 498. ISSN 0295-5075 (2004)
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
|---|---|
| Identification Number: | 10.1209/epl/i2004-10070-4 |
| Additional Information: | 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) |
| Subjects: | H Social Sciences > HA Statistics H Social Sciences > HB Economic Theory Q Science > QC Physics |
| Research Area: | Economics and Institutional Change |
| Depositing User: | Users 2 not found. |
| Date Deposited: | 30 Jun 2011 14:25 |
| Last Modified: | 31 Aug 2011 14:40 |
| URI: | http://eprints.imtlucca.it/id/eprint/650 |
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