Global and local collaborators: a study of scientific collaboration
Information Processing and Management: an International Journal - Special issue on Informetrics
Journal of the American Society for Information Science - Special issue: information resources and democracy
Aspects of JASIS authorship through five decades
Journal of the American Society for Information Science - Special issue on the 50th anniversary of the Journal of the American Society for Information Science: part 1: the journal, its society, and the future of print
Methods for accrediting publications to authors or countries: consequences for evaluation studies
Journal of the American Society for Information Science
Author inflation leads to a breakdown of Lotka's law
Journal of the American Society for Information Science and Technology
Duality revisited: construction of fractional frequency distributions based on two dual Lotka laws
Journal of the American Society for Information Science and Technology
Journal of the American Society for Information Science and Technology
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Lotka's law was formulated to describe the number of authors with a certain number of publications. Empirical results (Morris & Goldstein, 2007) indicate that Lotka's law is also valid if one counts the number of publications of coauthor pairs. This article gives a simple model proving this to be true, with the same Lotka exponent, if the number of coauthored papers is proportional to the number of papers of the individual coauthors. Under the assumption that this number of coauthored papers is more than proportional to the number of papers of the individual authors (to be explained in the article), we can prove that the size-frequency function of coauthor pairs is Lotkaian with an exponent that is higher than that of the Lotka function of individual authors, a fact that is confirmed in experimental results. © 2008 Wiley Periodicals, Inc.