Volume 67, Number 3, August 2004
|498 - 503
|Interdisciplinary physics and related areas of science and technology
|01 July 2004
Statistical properties of business firms structure and growth
Center for Polymer Studies and Department of Physics, Boston University Boston, MA 02215 USA
2 Facoltà di Economia, Università di Firenze and CERM Via Banchi di Sotto 55, 53100 Siena Italy
Accepted: 17 May 2004
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 . We also find that the average sales of products scales with the firm sales as a power law with exponent . And that the average number products of a firm scales with the firm sales as a power law with exponent . We compare these findings with the predictions of models proposed till date on growth of business firms.
PACS: 89.90.+n – Other topics in areas of applied and interdisciplinary physics / 05.45.Tp – Time series analysis / 05.40.Fb – Random walks and Levy flights
© EDP Sciences, 2004
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