Re: Early Download Impact Predicts Later Citation Impact

From: Stevan Harnad <>
Date: Sat, 5 Mar 2005 04:20:36 +0000

    Pertinent Prior AmSci Topic Threads:

    "Scientometric OAI Search Engines" (Aug 2002)

    "How to compare research impact of toll- vs. open-access research" (Jun 2003)

    "On the Strong Causal Connection Between Access and Impact" (Apr 2004)

    "Early Download Impact Predicts Later Citation Impact" (Sep 2004)

    "OA advantage = EA + AA + QB + OA + UA" (sep 2004)

    "Self-Archiving Incentives: Download Impact Counts" (Oct 2004)

On Fri, 4 Mar 2005, herbert van de sompel wrote:

> I thought you might be interested in the following paper:
> Johan Bollen, Herbert Van de Sompel, Joan Smith, Rick Luce. 2005. Toward
> alternative metrics of journal impact: A comparison of download and citation
> data. 34 pages, accepted by Information Processing and Management, special issue
> on Informetrics. preprint at
> The first author, Johan Bollen (see cc), has recently joined my team in Los
> Alamos to continue work in the realm of what is described in the paper. We hope
> to have some more interesting things to report on in a few months. And we will
> be happy to keep you posted.
> Herbert Van de Sompel
> Digital Library Research & Prototyping
> Los Alamos National Laboratory, Research Library
> tel. +1 505 667 1267

Thanks for your very interesting paper, which I am branching
to the OAI-citation and Sigmetrics groups [and the AmSci Forum].

We will cite it in the following paper, which you may also find of

    Brody, T. and Harnad, S. (2005) Earlier Web Usage Statistics
    as Predictors of Later Citation Impact. Technical Report, ECS,
    University of Southampton

You may also like to look at Tim Brody's download/citation correlator:

which has now been up for several years, as well as the latest
feature he has added to citebase, allowing download stats to be
displayed, along with citation stats:,J

You will not be too satisfied with the data for Johan, but that is only
because we have alas still not succeeded (despite trying for several years
now) in persuading Simeon Warner & Paul Ginsparg that this is a valuable
enough statistic to warrant letting us use the US ArXiv usage stats;
as it stands, it is just based on the data from our UK ArXiv mirror.

To get an idea of its true potential power, try:,E

The download/citation correlator would of course also be substantially
more powerful, sensitive and useful if it were based on the US ArXiv data
instead of just the UK mirror data. (In my opinion, this is just
one further reason why it is an *extremely* bad idea to allow a vast
collective database like ArXiv to become the "property" and prerogative
of one person. This is also one of the many reasons why I am working
so hard to ensure that self-archiving generalizes as distributed and
institution-based rather than central...)

I look forward to seeing more of your and Johan's work.

Stevan Harnad

A complete Hypermail archive of the ongoing discussion of providing
open access to the peer-reviewed research literature online (1998-2004)
is available at:
        To join or leave the Forum or change your subscription address:
        Post discussion to:

UNIVERSITIES: If you have adopted or plan to adopt an institutional
policy of providing Open Access to your own research article output,
please describe your policy at:

    BOAI-1 ("green"): Publish your article in a suitable toll-access journal
    BOAI-2 ("gold"): Publish your article in a open-access journal if/when
            a suitable one exists.
    in BOTH cases self-archive a supplementary version of your article
            in your institutional repository.
Received on Sat Mar 05 2005 - 04:20:36 GMT

This archive was generated by hypermail 2.3.0 : Fri Dec 10 2010 - 19:47:48 GMT