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Title: Comparing journals from different fields of science and social science through a JCR subject categories normalized impact factor
Authors: Dorta González, Pablo 
Dorta González,María Isabel 
UNESCO Clasification: 570106 Documentación
Keywords: Factor de impacto
Clasificación por materias
Issue Date: 2013
Publisher: 0138-9130
Journal: Scientometrics 
Abstract: The journal Impact Factor (IF) is not comparable among fields of science and social science because of systematic differences in publication and citation behaviour across disciplines. In this work, a decomposing of the field aggregate impact factor into five normally distributed variables is presented. Considering these factors, a principal component analysis is employed to find the sources of the variance in the Journal Citation Reports (JCR) subject categories of science and social science. Although publication and citation behaviour differs largely across disciplines, principal components explain more than 78 % of the total variance and the average number of references per paper is not the primary factor explaining the variance in impact factors across categories. The categories normalized impact factor based on the JCR subject category list is proposed and compared with the IF. This normalization is achieved by considering all the indexing categories of each journal. An empirical application, with one hundred journals in two or more subject categories of economics and business, shows that the gap between rankings is reduced around 32 % in the journals analyzed. This gap is obtained as the maximum distance among the ranking percentiles from all categories where each journal is included.
ISSN: 0138-9130
DOI: 10.1007/s11192-012-0929-9
Source: Scientometrics[ISSN 0138-9130],v. 95, p. 645-672
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