Science-Metrix has released three reports on open access: Proportion of Open Access Peer-Reviewed Papers at the European and World Levels—2004-2011, Open Data Access Policies and Strategies in the European Research Area and Beyond, and Open Access Strategies in the European Research Area.
Here's an excerpt from the announcement:
The first report measures the availability of scholarly publications in 22 fields of knowledge across the European Research Area, Brazil, Canada, Japan, and the United States, between 2004 and 2011. . . .
The second report, focusing on open access policies, showed a growing trend in the adoption of such policies by governments and other funding bodies. . . .
The third report found that open access to scientific data is less developed and more difficult to implement than open access to scholarly publications, both in terms of policies and infrastructure.
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