On Sun, 10 Dec 2006, Sally Morris (Chief Executive) wrote:
As I hoped, a publisher has come up with some real figures about
the effect of going OA after a short embargo. See below from
PNAS (forwarded with Diane's permission).
Dear Sally:
Let's keep our eye on the ball: The question is and has always
been: Is there any evidence that self-archiving (green) causes
cancellations?
Answer is still: No.
The PNAS report below is about making the journal freely
accessible (gold). That makes all of its contents, publisher's
version, at the publisher's website, free for all (gold) (within
a month).
I, for one, have never doubted that *that* could cause
cancellations. But anarchic author self-archiving, of each
author's postprints, in each author's own IR, in uncertain
proportions and at uncertain rates, are another story.
(But if/when mandated self-archiving should ever prove to cause
cancellations after all, publishing can and will adapt; research
should certainly not renounce its impact in order to insure
journals' current modus operandi against all risk from the new
medium!)
http://www.publications.parliament.uk/pa/cm200304/cmselect/cmsctech/399/399we152.htm
I wonder whether there are other publishers on this list who
have statistics they could share?
Let's hope that if they do, their stats will be to the point
(green), rather than off-topic (gold)!
Chrs, Stevan
Sally Morris, Chief Executive
Association of Learned and Professional Society Publishers
Email: sally.morris@alpsp.org
Website: www.alpsp.org
----- Original Message -----
From: "Sullenberger, Diane" <DSullenb@nas.edu>
To: "Sally Morris (Chief Executive)" <sally.morris@alpsp.org>
Sent: Monday, December 04, 2006 5:32 PM
Subject: RE: Study Identifies Factors That Could Lead to Cancelled
Subscriptions
Hi Sally,
In 2000, we were free after one month. We lost 11% of our paid
subscribers in 2001, higher than the industry average, and we
switched to 6 months in 2002. The move did not stem the loss in
subscribers but it was reduced to 9% in 2002. We do not have hard
data to show a causal effect of our one month policy, but the
correlation certainly motivated a change.
Best,
Diane