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Journals > Peer-Reviewed Journals > Open-Access Journals < OpenAccess

The exchange, below, about the apparent discrepancy in the estimates of
the current number of open access journals is resolved as follows:

Bowker's Ulrichsweb http://www.ulrichsweb.com/ulrichsweb/ indexes about
250,000 serials. Of those 250,000 serials about 10% (24,000) are
peer-reviewed journals. Of those 24,000 about 2.5% (600) are indexed by
The Directory of Open Access Journals http://www.doaj.org/ which indexes
only peer-reviewed journals.

Other indices and harvesters such as 
may index more free online full-text journals than
but the open-access movement is focussed on *peer-reviewed* journals only,
as defined in 
and only peer-reviewed journals are indexed by

And let us also not forget that apart from the 2.5% of yearly articles
from the 24,000 peer-reviewed journals that are openly accessible because
they are published in the 600 open-access ("gold") journals to date, at
least three times as many yearly articles (7.5%) from the 24,000
peer-reviewed journals are openly accessible because they are
self-archived by their authors:
This current total of 10% open access can immediately be increased to at
least 55% by self-archiving all the articles in the 55% of peer-reviewed
journals that are already "green" (or "blue" or "gold"):

> Date: Mon, 8 Dec 2003 08:50:29 +0000 (GMT)
> From: Subbiah Arunachalam <subbiah_a@yahoo.com>
> To: sathya <sathya@informindia.co.in>
> From: sathya <sathya@informindia.co.in>
>     J-Gate [ http://www.j-gate.informindia.co.in/] indexes open access
>     literature extensively. We index articles from 1,600 journals
>     available free online, and we are the only site doing this in the
>     world. (There are many sites who just put an html page of these
>     journals, but no one does indexing). In the coming years, we plan
>     to harvest e-print sites and index them too on our site.
> From: Subbiah Arunachalam <subbiah_a@yahoo.com>
>     [ The Directory of Open Access Journals http://www.doaj.org/ ] 
>     lists [only] 600.
> From: sathya <sathya@informindia.co.in>
>     It is possible that [http://www.doaj.org/ is] peer-reviewed journals
>     available free online. This could be 600. I can't separately count
>     peer-reviewed journals in my database.

[The following is from the AmSci Forum's Archive/]

"Re: Need for systematic scientometric analyses of open-access data"

    "It seems that (apart from a few well known titles) [of] the 14% free
    access biological periodicals listed by the Electronic Journal Library
    ...some are newsletters, some look like catalogues..."

"Request for journal/article/field statistics from Ulrichs and ISI"

    "The total number of refereed (peer-reviewed) journals
    Ulrich's indexes currently (24,116 active was latest figure)"
    [This is about 10% of the total of about 250,000 serials
     indexed by Ulrichs]

Stevan Harnad