Open Access Uptake by Universities Worldwide | Nicolas Robinson-Garcia, Rodrigo Costas and Thed N. van Leeuwen | PeerJ, 8:e9410, 1-20. July 8, 2020.
While concentrating on indicators of open access (OA) adoption at the institutional level for universities worldwide, this study uses data from Web of Science, Unpaywall and the Leiden Ranking disambiguation of institutions, to track OA coverage of universities’ output for 963 institutions.
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As this study indicates, across as different academic fields as mathematics and humanities, Green Open Access accounts for the predominant share of articles published by universities worldwide, ranging from single-digit percentage points to almost 100%, even though the median levels vary from around 25% to 35%. Though Gold Open Access follows Green Open Access as the second most important publishing model, its median levels move from approximately 5% to about 20%, despite the presence of few outlier institutions with over 75% or 100% articles published in Gold Open Access.
As concerns cross-regional comparisons, Green Open Access levels demonstrate the largest variation with European and North American universities showing similar median adoption levels of slightly above 35%, Oceania and South America converging at about 30%, Africa at below 25% and Asia at above 20%. In contrast, only in South America does Gold Open Access attain median levels of above 25%, whereas in all other regions this model accounts for approximately twice as smaller share of university-published papers.