Scientometrics

, Volume 17, Issue 3–4, pp 211–226 | Cite as

“Power law” version of Bradford's law: Statistical tests and methods of estimation

  • S. Naranan
Article

Abstract

Is is shown, using rigorous statistical tests, that the number of journals (J) carryingp papers in a given subject can be expressed as a simple power law functionJ(p)=K p −γ , K and γ being constants. The standard maximum likelihood method of estimating γ has been suitably modified to take acoount of the fact thatp is a discrete integer variable. The parameter γ entirely characterises the scatter of articles in journals in a given bibliography. According to a dynamic model proposed earlier by the author, γ is a measure of the relative growth rates of papers and journals pertaining to the subject.

Keywords

Growth Rate Relative Growth Rate Likelihood Method Maximum Likelihood Method Integer Variable 

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Copyright information

© Akadémiai Kiadó 1989

Authors and Affiliations

  • S. Naranan
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombayIndia

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