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Characterizing and modeling citation dynamics

Eom, Young-Ho and Fortunato, Santo Characterizing and modeling citation dynamics. PloS One, 6 (9). e24926. ISSN 1932-6203 (2011)

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Citation distributions are crucial for the analysis and modeling of the activity of scientists. We investigated bibliometric data of papers published in journals of the American Physical Society, searching for the type of function which best describes the observed citation distributions. We used the goodness of fit with Kolmogorov-Smirnov statistics for three classes of functions: log-normal, simple power law and shifted power law. The shifted power law turns out to be the most reliable hypothesis for all citation networks we derived, which correspond to different time spans. We find that citation dynamics is characterized by bursts, usually occurring within a few years since publication of a paper, and the burst size spans several orders of magnitude. We also investigated the microscopic mechanisms for the evolution of citation networks, by proposing a linear preferential attachment with time dependent initial attractiveness. The model successfully reproduces the empirical citation distributions and accounts for the presence of citation bursts as well.

Item Type: Article
Identification Number: 10.1371/journal.pone.0024926
Projects: This work was supported by the ICTeCollective, FET-Open grant number 238597 of the European Commission
Subjects: H Social Sciences > HA Statistics
Q Science > QC Physics
Z Bibliography. Library Science. Information Resources > Z665 Library Science. Information Science
Research Area: Computer Science and Applications
Depositing User: Ms T. Iannizzi
Date Deposited: 02 Dec 2014 15:39
Last Modified: 18 Dec 2014 13:55
URI: http://eprints.imtlucca.it/id/eprint/2386

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