RT Generic
T1 The effect on citation inequality of differences in citation practices at the Web of Sciences subject category level
A1 Crespo, Juan A.
A1 Herranz, Neus
A1 Li, Yunrong
A1 Ruiz-Castillo, Javier
A2 Universidad Carlos III de Madrid. Departamento de Economía, 
AB This paper studies the impact of differences in citation practices at the sub-field, or Web of Sciencesubject category level using the model introduced in Crespo et al. (2012) according to which the number ofcitations received by an article depends on its underlying scientific influence and the field to which it belongs.We use the same Thomson Reuters dataset of about 4.4 million articles published in 1998-2003 with a fiveyearcitation window used in Crespo et al. (2013) to analyze a classification system consisting of 22 broadfields. The main results are the following four. Firstly, as expected, when the classification system goes from22 broad fields to 219 sub-fields the effect on citation inequality of differences in citation practices increasesfrom approximately 14% at the field level to 18% at the sub-field level. Secondly, we estimate a set ofexchange rates (ERs) to express the citation counts of articles in a wide quantile interval into the equivalentcounts in the all-sciences case. For example, in the fractional case we find that in 187 out of 219 sub-fields theERs are reliable in the sense that the coefficient of variation is smaller than or equal to 0.10. ERs areestimated over the [660, 978] interval that, on average, covers about 62% of all citations. Thirdly, in thefractional case the normalization of the raw data using the ERs (or sub-field mean citations) as normalizationfactors reduces the importance of the differences in citation practices from 18% to 3.8% (3.4%) of overallcitation inequality. Fourthly, the results in the fractional case are essentially replicated when we adopt themultiplicative approach
SN 2340-5031
YR 2013
FD 2013-02
LK https://hdl.handle.net/10016/16327
UL https://hdl.handle.net/10016/16327
LA eng
DS e-Archivo
RD 19 may. 2024