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An extension of the h index that covers the tail and the top of the citation curve and allows ranking researchers with similar h

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  • García-Pérez, Miguel A.

Abstract

Citation curves for researchers with the same h index can vary greatly in the heaviness of their top (excess citations to core papers) or the heaviness of their tail (citations to non-core papers), revealing quantitative differences across researchers. Also, promotion to the next higher h depends only on citations received by a small subset of papers, so that researchers with a given h may have citation curves whose top and tail reveal a weaker impact than that of researchers with a lower h. To overcome these problems, we propose a two-sided h index, an extension that computes additional h indices progressively up the top and out the tail of the citation curve. This extension represents a citation curve descriptor one of whose elements is the scalar h. The advantages of the two-sided h index are illustrated through analysis of citation curves for 88 researchers with h indices ranging from 8 to 20. Several schemes are also discussed that use the two-sided h index to define criteria for ranking researchers within and across scalar h indices, according to whether the top of the citation curve, its tail, or both are deemed relevant under the circumstances in which research accomplishments are assessed.

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  • García-Pérez, Miguel A., 2012. "An extension of the h index that covers the tail and the top of the citation curve and allows ranking researchers with similar h," Journal of Informetrics, Elsevier, vol. 6(4), pages 689-699.
    • Handle: RePEc:eee:infome:v:6:y:2012:i:4:p:689-699
    DOI: 10.1016/j.joi.2012.07.004
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