Working Together to Promote Open Access Policy Alignment in Europe: Work Package 3 report: Open Access Policies
peter.suber's bookmarks 2019-01-18
First, deposit rates were measured for articles in the repositories of both mandated and non-mandated institutions, and compared to the total number of articles published from these institutions. The material was identified as Metadata-Only, Full-Text, Open Access and Restricted Access. Open Access and Restricted Access are subsets of Full-Text and together comprise the whole of that category. Restricted Access means full-text articles that are showing only their metadata, with the text itself closed off, and are usually in this state for a period of embargo. Across all institutions, more than three-quarters of published articles are not deposited at all, 8% are Metadata-Only, 3% Restricted Access and 12% Open Access. The rates vary by discipline. Deposit of Open Access material was over four times as high (14%) for institutions with a mandatory policy than for those without (3%). The top 20 institutions (all mandated) in terms of amount of repository content are listed. The top five are the University of Liège (Belgium), Instituto Politecnico de Bragança (Portugal), the National Institute of Oceanography (India), University of Pretoria (South Africa) and the University of Minho (Portugal).
Second, the time lag between publication and deposit of articles (deposit latency, which may be negative if the article is deposited before publication) was measured. Open Access items tend to be deposited later than Restricted Access ones, and latency periods tend to be longer in mandated institutions than in non-mandated ones (though deposits themselves are four times higher), probably because authors who deposit voluntarily are self-motivated and will do it early.
Third, we examined the deposit rate in relation to different policy criteria:....
Fourth, we examined the correlation between deposit latency (specifically, the latency of deposit within the first year after publication) and different policy criteria. There is positive correlation between early deposit and Mandate age, Cannot waive rights retention and deposit immediately. We found significant correlation between early Open Access deposits and the age of the mandate: that is, the longer a mandatory policy has been in place, the more effective it can become...."