The Effect of open access on citation impact. An analysis of ArXiv's condensed matter section by Henk F. Moed in JASIST November 2007

[Eugene Garfield]

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Title: The effect of "Open access" on citation impact: An analysis of
ArXiv's condensed matter section

Authors: Moed, HF 

Author Full Names: Moed, Henk F.

Source: JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND
TECHNOLOGY 58 (13): 2047-2054 NOV 2007

Language: English

Document Type: Article

Abstract: This article statistically analyzes how the citation impact of
articles deposited in the Condensed Matter section of the preprint
server ArXiv (hosted by Cornell University), and subsequently published
in a scientific journal, compares to that of articles in the same
journal that were not deposited in the archive. Its principal aim is to
further illustrate and roughly estimate the effect of two factors,
"early view" and "quality bias," on differences in citation impact
between these two sets of papers, using citation data from Thomson
Scientific's Web of Science. It presents estimates for a number of
journals in the field of condensed matter physics. To discriminate
between an "open access" effect and an early view effect, longitudinal
citation data were analyzed covering a time period as long as 7 years.
Quality bias was measured by calculating ArXiv citation impact
differentials at the level of individual authors publishing in a
journal, takin! g into account coauthorship. The analysis provided
evidence of a strong quality bias and early view effect. Correcting for
these effects, there is in a sample of six condensed matter physics
journals studied in detail no sign of a general "open access advantage"
of papers deposited in ArXiv. The study does provide evidence that ArXiv
accelerates citation due to the fact that ArXiv makes papers available
earlier rather than makes them freely available.

Reprint Address: Moed, HF, Leiden Univ, Ctr Sci & Technol Studies, POB
9555, NL-2300 RB Leiden, Netherlands.

Research Institution addresses: Leiden Univ, Ctr Sci & Technol Studies,
NL-2300 RB Leiden, Netherlands

E-mail Address: moed at cwts.leidenuniv.nl

Cited References: DAVIS PM, 2006, SCIENTOMETRICS, V71.
EGGHE L, 2000, J AM SOC INFORM SCI, V51, P158.
EYSENBACH G, 2006, PLOS BIOL, V4, P692.
GARFIELD E, 1972, SCIENCE, V178, P471.
HARNAD S, 2004, DLIB MAGAZINE, V10.
KURTZ MJ, 2005, INFORM PROCESS MANAG, V41, P1395.
MOED HF, 2005, CITATION ANAL RES EV.

Cited Reference Count: 7

Times Cited: 0

Publisher: JOHN WILEY & SONS INC; 111 RIVER ST, HOBOKEN, NJ 07030 USA

Subject Category: Computer Science, Information Systems; Information
Science & Library Science

ISSN: 1532-2882

IDS Number: 228PE

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