eprintid: 650
rev_number: 12
eprint_status: archive
userid: 2
dir: disk0/00/00/06/50
datestamp: 2011-06-30 14:25:51
lastmod: 2011-08-31 14:40:39
status_changed: 2011-06-30 14:25:51
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Pammolli, Fabio
creators_name: Matia, Kaushik
creators_name: Fu, Dongfeng
creators_name: Buldyrev, Sergey V.
creators_name: Riccaboni, Massimo
creators_name: Stanley, H. Eugene
creators_id: f.pammolli@imtlucca.it
creators_id: 
creators_id: 
creators_id: 
creators_id: massimo.riccaboni@imtlucca.it
creators_id: 
title: Statistical properties of business firms structure and growth
ispublished: pub
subjects: HA
subjects: HB
subjects: QC
divisions: EIC
full_text_status: none
note:   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)

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.
date: 2004
date_type: published
publication: EPL (Europhysics Letters)
volume: 67
number: 3
publisher: EDP Sciences
pagerange: 498
id_number: 10.1209/epl/i2004-10070-4
refereed: TRUE
issn: 0295-5075
official_url: http://stacks.iop.org/0295-5075/67/i=3/a=498
citation:   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)