Comparing the Impact of Open Access (OA) vs. Non-OA Articles in the Same Journals

D-Lib Magazine, June 2004, Volume 10 Number 6, ISSN 1082-9873

Comparing the Impact of Open Access (OA) vs. Non-OA Articles in the Same Journals
The way to test the impact advantage of Open Access (OA) is not to compare the citation impact factors of OA and non-OA journals but to compare the citation counts of individual OA and non-OA articles appearing in the same (non-OA) journals. Such ongoing comparisons are revealing dramatic citation advantages for OA

References

Brody, T., Stamerjohanns, H., Harnad, S. Gingras, Y. Vallieres, F. & Oppenheim, C. (2004) The effect of Open Access on Citation Impact. Presented at: National Policies on Open Access (OA) Provision for University Research Output: an International meeting. Southampton University, Southampton UK. 19 February 2004.

Garfield, E. (1998) The use of journal impact factors and citation analysis in the evaluation of science. Presented at the 41st Annual Meeting of the Council of Biology Editors, Salt Lake City, UT, May 4, 1998 – April 17, 1998

Harnad, S., Brody, T., Vallieres, F., Carr, L., Hitchcock, S., Gingras, Y., Oppenheim, C., Stamerjoanns, H., & Hilf, E.R. (2004) The green and the gold roads to Open Access. Nature (web focus)

Kurtz, M.J. (2004) Restrictive access policies cut readership of electronic research journal articles by a factor of two, Harvard-Smithsonian Centre for Astrophysics, Cambridge, MA

Lawrence, S. (2001) Online or Invisible? Nature 411 (6837): 521

Odlyzko, A.M. (2002) The rapid evolution of scholarly communication.” Learned Publishing 15: 7-19 .

Pringle, J. (2004) Do open access journals have impact? Nature (Web Focus)

Swan, A. & Brown, S.N. (2004a) Authors and open access publishing. Learned Publishing 2004:17(3) 219-224

Swan, A. & Brown, S.N. (2004b) JISC/OSI Journal Authors Survey Report

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