The iceberg hypothesis revisited

Authors:
Bárbara S. Lancho-Barrantes;Vicente P. Guerrero-Bote;Félix Moya-Anegón
Affiliations:
Departamento de Información y Comunicación, Grupo Scimago, Universidad de Extremadura, Badajoz, Spain 06071;Departamento de Información y Comunicación, Grupo Scimago, Universidad de Extremadura, Badajoz, Spain 06071 and Facultad de Biblioteconomía y Documentación, Universidad de Extr ...;Grupo Scimago, CSIC, CCHS, IPP, Madrid, Spain
Venue:
Scientometrics
Year:
2010

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Abstract

A study is described of the rank/JIF (Journal Impact Factor) distributions in the high-coverage Scopus database, using recent data and a three-year citation window. It includes a comparison with an older study of the Journal Citation Report categories and indicators, and a determination of the factors most influencing the distributions. While all the specific subject areas fit a negative logarithmic law fairly well, those with a greater External JIF have distributions with a more sharply defined peak and a longer tail--something like an iceberg. No S-shaped distributions, such as predicted by Egghe, were found. A strong correlation was observed between the knowledge export and import ratios. Finally, data from both Scopus and ISI were used to characterize the rank/JIF distributions by subject area.