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Some Comments on Egghe’s Derivation of the Impact Factor Distribution

By L.R. Waltman and N.J.P. van Eck

Abstract

In a recent paper, Egghe [Egghe, L. (in press). Mathematical derivation of the impact factor distribution. Journal of Informetrics] provides a mathematical analysis of the rank-order distribution of journal impact factors. We point out that Egghe’s analysis relies on an unrealistic assumption, and we show that his analysis is not in agreement with empirical data.distribution;rank-order distribution;impact factor

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Citations

  1. (2009). Differences in impact factor across fields and over time.
  2. (1996). Measuring the impact of scientific publications. The case of the biomedical sciences.
  3. (2003). On a Zipf’s law extension to impact factors.
  4. (2007). On the behavior of journal impact factor rank-order distribution.
  5. (2007). Scoring research output using statistical quantile plotting.
  6. (1983). Statistical reliability of comparisons based on the citation impact of scientific publications.
  7. (2009). The multi-dimensionality of journal impact.

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