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Bradford law in R&D expending of firms and R&D concentration

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Abstract

The applicability of the Bradford law to the R&D expending of firms is examined and its usefulness is proved. It successfully identifies core firms, peripheral firms and minor firms. It also provides a measure to evaluate the degree of R&D concentration to a small number of firms.

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References

  1. I. ASAI, A General Formulation of Bradford's Distribution: The Graph-Oriented Approach,J. Amer. Soc. for Information Science, 32 (1981) 113–119.

    Google Scholar 

  2. M. BONITZ, Evidence for the Invalidity of the Bradford Law for the Single Scientist,Scientometrics, 2 (1980) 203–214.

    Google Scholar 

  3. S. C. BRADFORD,Documentation, Crosby Lockwood, London, 1948.

    Google Scholar 

  4. B. C. BROOKES, Bradford's Law and the Bibliography of Science, Nature, 224 (1969) 953–956.

    Google Scholar 

  5. P. M. MORSE, F. F. LEIMKUHLER, Exact Solution for the Bradford Distribution and Its Use in Modeling Informational Data,J. Operations Research Soc. Amer., 27 (1979) 187–198.

    Google Scholar 

  6. P. M. MORSE, The Underlying Characteristics of the Bradford Distribution,Scientometrics, 3 (1981) 415–436.

    Google Scholar 

  7. Nippon Keizai Press (ed),The Report of Corporations, 1981 Fall, Nippon Keizai Press, Tokyo, 1981.

    Google Scholar 

  8. J. VLACHY, Frequency Distributions of Scientific Performance. A Bibliography of Lotka's Law and Related Phenomena,Scientometrics, 1 (1978) 109–130.

    Google Scholar 

  9. A. L. YABLONSKY, On Fundamental Regularities of the Distribution of Scientific Productivity,Scientometrics. 2 (1980) 3–34.

    Google Scholar 

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Eto, H. Bradford law in R&D expending of firms and R&D concentration. Scientometrics 6, 183–188 (1984). https://doi.org/10.1007/BF02016761

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  • DOI: https://doi.org/10.1007/BF02016761

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