The PEER (Publishing and the Ecology of European Research) project has released the PEER: Final Report.
Here's an excerpt:
PEER (Publishing and the Ecology of European Research), supported by the EC eContentplus programme2, has been investigating the potential effects of the large-scale, systematic depositing of authors' final peer-reviewed manuscripts (so called Green Open Access or stage-two research output) on reader access, author visibility, and journal viability, as well as on the broader ecology of European research. The project ran from 1 September 2008–31 May 2012. . . .
Collectively, the project has provided insights and evidence indicating:
- How large-scale archiving may affect journals
- Whether it increases access
- How it will affect the broader ecology of European research
- Which factors influence the readiness to deposit in institutional and disciplinary repositories
- What the cost drivers are for publishers and repositories
The project also released PEER Usage Study—Descriptive Statistics for the Period March to August 2011 and PEER Usage Study—Randomised Controlled Trial Results.