Heather,
In the absence of strong evidence, it is difficult to speak of a dramatic
growth. The specific challenge of measuring OA availability is that in order to
measure growth you need to measure at different points in time with the same
measure or to be able to re-calibrate your measures for each different
measures. This is due to the effects of journals which contents become free
over time, embargoes, and backfilling.
Here are measures of gratis OA availability as measured in 122 oncology and
carcinogenesis journals by examining what is currently available in 1science
oaIndx (which compiles gratis OA) coupled with data from Thomson Reuters Web of
Science (WoS). Please note that this is a population based measure (all of the
papers in WoS for these journals are measured) but we haven't done a
calibration of oaIndx in this field so I cannot tell you what the recall and
precision are. I would say precision is about 98 to 99% and recall between 70%
to 80%, meaning these percentages could be multiplied by an approximate
calibration factor of about 1.33. The results are presented here - I just
computed them as I'm finishing a report on a German university's library's
subscriptions and had these data available by extracting this small part from
the report. The one before last column is the measured, floor quantity of
gratis OA. This shows that as measured in June 2016, the effect of backfilling
and desembargoing could be substantial but as we don't have a similar point of
measure back in time this can only be surmised. What is clear is that in such
an important area of research for human health, embargoes are still hurting
free knowledge circulation and we are still too far from 100% gratis OA.
These data are CC BY - feel free to use - cite the List here if you want to use
(sorry too busy to publish anything these days)
Gratis OA papers found and total papers in WoS in 122 published in journals
classified in "Oncology & Carcinogenesis" (Science-Metrix Journal
Classification)
Year // Papers in 1science oaIndx//Papers in WoS // Measured % Gratis OA //
Approx. % with 1.33 calibration
2006 8,368 16,890 50% 66%
2007 8,915 17,775 50% 67%
2008 9,492 18,358 52% 69%
2009 9,394 18,684 50% 67%
2010 10,207 19,236 53% 71%
2011 9,910 19,694 50% 67%
2012 9,940 21,135 47% 63%
2013 12,046 23,597 51% 68%
2014 12,487 26,201 48% 64%
2015 7,975 24,003 33% 44%
Source: Computed by Science-Metrix in collaboration with 1science using
1science oaIndx and Thomson Reuters' Web of Science data.
Have a nice Canada day!
Eric Archambault, Ph.D.
President and CEO | Président-directeur général
Science-Metrix & 1science
-----Original Message-----
From: goal-boun...@eprints.org [mailto:goal-boun...@eprints.org] On Behalf Of
Heather Morrison
Sent: June 30, 2016 4:46 PM
To: Global Open Access List (Successor of AmSci) <goal@eprints.org>
Subject: [GOAL] Dramatic Growth of Open Access: June 30, 2016
The June 30, 2016 version of the Dramatic Growth of Open Access is now
available:
http://poeticeconomics.blogspot.ca/2016/06/dramatic-growth-of-open-access-june-30.html
Highlights
Over 40% of the cancer literature indexed by PubMed is available as full-text
within 3 years of publication (17% within 30 days) Internet Archive exceeds 10
million free texts Ongoing strong growth in open access archives, both
repositories and content, as seen through OpenDOAR, ROAR, and BASE 50% annual
growth rate for the Directory of Open Access Books Directory of Open Access
Journals has overall negative growth due to major clean-up but showed strong
growth in articles searchable at article level and now adding titles at the
rate of 4.5 per day Concern noted about the apparent ongoing dramatic growth of
Elsevier
best,
--
Dr. Heather Morrison
Assistant Professor
École des sciences de l'information / School of Information Studies University
of Ottawa http://www.sis.uottawa.ca/faculty/hmorrison.html
Sustaining the Knowledge Commons http://sustainingknowledgecommons.org/
heather.morri...@uottawa.ca
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