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Electronic Journals LibraryDOAB
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.
