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[BOAI] Re: Graphic needed to illustrate the effect of access on impact
From: Stevan Harnad <harnad AT ecs.soton.ac.uk>
Many thanks to Andrew Odlyzko for pointing out the valuable NASA study on the relation between usage impact and citation impact in astrophysics at http://cfa-www.harvard.edu/~kurtz/jasist-submitted.ps (converted to PDF at http://www.ecs.soton.ac.uk/~harnad/Temp/jasist.pdf). This very rich and informative NASA/ADS study confirms what Tim Brody has also been finding in our analyses of the Physics Arxiv: http://www.ecs.soton.ac.uk/~harnad/Temp/time-course.gif http://www.ecs.soton.ac.uk/~harnad/Temp/usage-citation.gif and his citation and co-citation analyses with citebase: http://citebase.eprints.org/cgi-bin/search See especially Tim Brody's correlator at: http://citebase.eprints.org/analysis/correlation.php Tim is now working on making this into a variable time-window correlator, so he can look at correlations in relation to time at different latencies. We are studying the systematic relationship between usage and citations, across time. We are also making Steve-Lawrence-like controlled comparisons with usage/citation patterns for comparable (1) toll-access paper-only or paper+online articles versus (2) self-archived open-access articles http://www.neci.nec.com/~lawrence/papers/online-nature01/ in order to demonstrate graphically to all researchers in all disciplines the strong causal relationship that exists between research access and research impact, and how and why delay in self-archiving is losing them all substantial quantities of research impact daily: http://www.ecs.soton.ac.uk/~harnad/self-archiving.ppt Stevan Harnad ---------- Forwarded message ---------- Date: Sun, 11 May 2003 15:19:56 -0500 (CDT) From: Andrew Odlyzko <odlyzko AT dtc.umn.edu> To: harnad AT ecs.soton.ac.uk Subject: benefits of free electronic distribution Stevan, A colleague has just sent me a pointer to what appears to be an important study that carefully documents quantitatively the benefits of open access to scientific literature. It is a paper by M. J. Kurtz, G. Eichorn, A. Accomazzi, C. Grant, M. Demleitner, S. S. Murray, N. Martimbeau, and B. Elwell, "The NASA astrophysics data system: Sociology, bibliometrics, and impact." It is available at <ttp://cfa-www.harvard.edu/~kurtz/jasist-submitted.ps (PostScript only, it appears.) You might like to publicize this through some of the mailing lists you moderate or have access to. An interesting tidbit (quoting from the Abstract): ... We then introduce the concept of utility time to measure the impact of the ADS and the electronic astronomical library on astronomical research. We find that in 2002 it amounted to the equivalent of 736 FTE researchers, or $250 million, or the astronomical research done in France. Best regards, Andrew Odlyzko
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