Two models of the mechanism responsible for the distribution of scientific papers in an area over periodicals are given. Empirical distributions following Bradford's law are shown to agree quite closely with a lognormal distribution. This distribution arises, in one model, by taking the probability of a paper being published in a particular journal as the product of many independent factors. It can also arise, according to an alternative mechanism. by random subdivision of the papers in a field over the journals. The mechanisms are compared with other models in the literature.
KeywordsLognormal Distribution Independent Factor Empirical Distribution Alternative Mechanism Scientific Paper
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- S. C. BRADFORD,Documentation, Crosby Lockwood, London, 1948.Google Scholar
- B. C. BROOKES, Bradford's Law and the Bibliography of Science,Nature, 224, Dec. 6, (1969) 953–956.Google Scholar
- M. G. KENDALL, The Bibliography of Operational Research,Operational Research Quarterly, II, Nos. 1/2, (1960) 31–36.Google Scholar
- G. K. Zipf,Human Behaviour and the Principle of Least Effort, Addison-Wesley Press, 1949.Google Scholar
- F. F. LEIMKUHLER, An Exact Formulation of Bradford's Law,Journal of Documentation 36, (1980) 285–292.Google Scholar
- B. C. VICKERY, Bradford's Law of Scattering,Journal of Documentation, 4 (1948) 198.Google Scholar
- H. A. SIMON, On a Class of Skew Distribution Functions,Biometrika, 42 (1955) 425.Google Scholar
- A. AVRAMESCU, Coherent Informational Energy and Entropy,Journal of Documentation, 36, No. 4, December (1980) 293–312.Google Scholar
- W. Shockley, On the Statistics of Individual Variations of Productivity in Research Laboratories,Proceedings of the IRE, March (1957) 279–290.Google Scholar
- P. F. COLE, A New Look at Reference Scattering,Journal of Documentation, 18 (1962) 58–64.Google Scholar