Modelling successive h-indicesModelling successive h-indices
Faculty of Social Sciences. Instructional and Educational Sciences

Information, Emancipation and Development

article

2008Amsterdam, 2008

Documentation and information

Scientometrics: an international journal for all quantitative aspects of the science of science and science policy. - Amsterdam

77(2008):3, p. 377-387

0138-9130

000261950000001

E

English (eng)

University of Antwerp

From a list of papers of an author, ranked in decreasing order of the number of citations to these papers one can calculate this authors Hirsch index (or h-index). If this is done for a group of authors (e.g. from the same institute) then we can again list these authors in decreasing order of their h-indices and from this, one can calculate the h-index of (part of) this institute. One can go even further by listing institutes in a country in decreasing order of their h-indices and calculate again the h-index as described above. Such h-indices are called by Schubert [2007] successive h-indices. In this paper we present a model for such successive h-indices based on our existing theory on the distribution of the h-index in Lotkaian informetrics. We show that, each step, involves the multiplication of the exponent of the previous h-index by 1/á where á > 1 is a Lotka exponent. We explain why, in general, successive h-indices are decreasing. We also introduce a global h-index for which tables of individuals (authors, institutes,...) are merged. We calculate successive and global h-indices for the (still active) D. De Solla Price awardees.

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