Defining a core: Theoretical observations on the Egghe-Rousseau proposal

Quentin L. Burrell ()
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Quentin L. Burrell: Isle of Man International Business School

Scientometrics, 2003, vol. 57, issue 1, No 5, 75-92

Abstract: Abstract In a recent paper Egghe & Rousseau (2002) have readdressed the problem of defining the “core” of a subject's literature by focussing on the productivity of the contributing sources as measured by their influence on an overall concentration value. Here we generalise Egghe & Rousseau's empirical approach, based upon the Gini index, to a more theoretical setting. This allows a simple visualisation of the geometry of the procedure and a complete analysis in certain classic cases. We conclude that, without additional empirical support, the approach does not appear to offer real improvement on more established and intuitively appealing schemes.

Date: 2003
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DOI: 10.1023/A:1023623603913

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