Understanding differences of the OA uptake within the German university landscape (2010–2020): part 1—journal-based OA

Abstract

Abstract This study investigates the determinants for the uptake of Full and Hybrid Open Access (OA) in the university landscape of Germany and distinguishes between three factors: The disciplinary profile, infrastructures and services of universities that aim to support OA, and large transformative agreements. The uptake of OA, the influence of the disciplinary profile of universities and the influence of transformative agreements is measured by combining several data sources (incl. Web of Science, Unpaywall, an authority file of standardised German affiliation information, the ISSN-Gold-OA 4.0 list, and lists of publications covered by transformative agreements). For infrastructures and services that support OA , a structured data collection was created by harvesting different sources of information and by manual online search. To determine the explanatory power of the different factors, a series of regression analyses was performed for different periods and for both Full as well as Hybrid OA. As a result of the regression analyses, the most determining factor for the explanation of differences in the uptake of both OA-types turned out to be the disciplinary profile. For the year 2020, Hybrid OA transformative agreements have become a second relevant factor. However, all variables that reflect local infrastructural support and services for OA turned out to be non-significant. To deepen the understanding of the adoption of OA on the level of institutions, the outcomes of the regression analyses are contextualised by an interview study conducted with 20 OA officers of German universities.