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Electronic Journals Library
DOAB
OpenDOAR
Bielefeld Academic Search Engine (BASE)
Highwire Free
PubMedCentral
arXiv
RePEC
Social Sciences Research Network
Registry of Open Access Material Archiving Policies (ROARMAP)
Internet Archive
DOAB: over 2,200 open access books from 70 publishers, annual growth rate over 40%
The
Directory of Open Access Books currently lists 2,261 books from 77 publishers. The over 40% annual
growth rate applies to both books and publishers.
OpenDOAR:2,700 repositories
The
Directory of Open Access Repositories
lists 2,729 repositories, an 11% increase (277 repositories) over the
past year. Another way to express this trend, at least in some regions
like Canada: having an open access repository is rapidly becoming the
norm, an essential service for a university or a research institution.
Bielefeld Academic Search Engine (BASE):over 64 million documents
from over 3,000 content providers. Over the past year BASE grew by over
14 million documents for a growth rate of 29%.
Bielefeld Academic Search Engine
is the service that I use for the best guesstimate of how much content
is available through all of those open access repositories. This number
is far from perfect as not all items in all of the repositories are open
access, there could be duplication, and there is a wide range of
content types. However, BASE is the best number I have found to indicate
the broader growth of open access including all of these content types
and even the freely available metadata; and, if only a very small
portion of BASE's growth were due to peer-reviewed journal articles
becoming open access, that would still be highly significant. For
example, if all of the world's approximately 1.5 million peer reviewed
articles produced yearly became OA through a repository over the past
year, that would only account for 10% of BASE's 14 million document
growth.
Highwire Free includes over 2.3 million free articles, and 109 completely free sites.
PubMedCentral: over 3.2 million free fulltext, 14% increase over past
year. 1,890 (close to 2,000) journals actively participating in PMC, a
15% jump from last year. 20% increase in journals offering immediate
free access (1,358 journals) and 17% increase in journals with all
articles open access (1,163).
PubMedCentral: PubMed now
links to over 3.2 million free fulltext items, an increase of about
400,000 over the past year for an annual growth rate of 14%. There was a
15% growth of journals actively participating in PubMedCentral, up 243
over the past year for a current total of 1,890 (close to 2,000 would be
a reasonable ballpark figure to quote). The number of journals in PMC
offering immediate free access increased by 20% to a total of 1,358 and
the number of journals in PMC with all articles open access increased by
17% for a total of 1,163.
arXiv is approaching 1 million items (974,813), annual growth rate 11%.
RePEC has about 1.5 million downloadable items.
Growth rates not available due to a combination of changes at RePEC and
my rather substantial error in calculating RePEC numbers in June.
The Social Sciences Research Network (SSRN) has 469,960 full text papers (close to 500,00) and an annual growth rate of 13%.
The Registry of Open Access Material Archiving Policies (ROARMAP) lists 483 open access policies (close to 500), an increase of 16% in the past year.
The Internet Archive continues
to be the exception to the rule that new, smaller initiatives have an
easier time demonstrating high growth rates. The Internet Archive
currently includes over
430 billion web pages (20% annual increase),
1.7 million videos (25% annual increase), 133,000 concerts (10% annual
increase), 2 million audio recordings (23% increase) and 6.5 million
texts (29% annual increase).
Courtesy:
http://poeticeconomics.blogspot.in/ - Dramatic Growth of Open Access dataverse.