Three-feature model to reproduce the topology of citation networks and the effects from authors鈥?visibility on their h-index
- 作者：Diego Raphael Amancio ; diego.amancio@usp.br ; diegoraphael@gmail.com ; Osvaldo Novais Oliveira Jr. ; Luciano da Fontoura Costa
- 关键词：Scientometry ; h-Index ; Citation networks ; Complex networks ; Network model
- 刊名：Journal of Informetrics
- 出版年：2012
- 期刊代码：1_17511577
- 类别：dec
- 出版时间：July, 2012
- 卷：6
- 期：3
- 页码：427-434
- 文件大小：402 K
摘要
Various factors are believed to govern the selection of references in citation networks, but a precise, quantitative determination of their importance has remained elusive. In this paper, we show that three factors can account for the referencing pattern of citation networks for two topics, namely 鈥済raphenes鈥?and 鈥渃omplex networks鈥? thus allowing one to reproduce the topological features of the networks built with papers being the nodes and the edges established by citations. The most relevant factor was content similarity, while the other two - in-degree (i.e. citation counts) and age of publication - had varying importance depending on the topic studied. This dependence indicates that additional factors could play a role. Indeed, by intuition one should expect the reputation (or visibility) of authors and/or institutions to affect the referencing pattern, and this is only indirectly considered via the in-degree that should correlate with such reputation. Because information on reputation is not readily available, we simulated its effect on artificial citation networks considering two communities with distinct fitness (visibility) parameters. One community was assumed to have twice the fitness value of the other, which amounts to a double probability for a paper being cited. While the h-index for authors in the community with larger fitness evolved with time with slightly higher values than for the control network (no fitness considered), a drastic effect was noted for the community with smaller fitness.