131 citations
- University of GöttingenDE8 papers
- Freie Universität BerlinDE3 papers
- GESIS - Leibniz Institute for the Social SciencesDE3 papers
- Hanken School of EconomicsFI3 papers
- German Centre for Higher Education Research and Science StudiesDE2 papers
- Bielefeld UniversityDE1 paper
- Christian-Albrechts-Universität zu KielDE1 paper
- ZBW – Leibniz-Informationszentrum WirtschaftDE1 paper
9 papers
Estimating transformative agreement impact on hybrid open access: A comparative large-scale study using Scopus, Web of Science and open metadata
Najko Jahn
This study compares open metadata from hoaddata, an openly available dataset based on Crossref, OpenAlex and the cOAlition S Journal Checker Tool, with proprietary bibliometric dat…
Analysis of the Publication and Document Types in OpenAlex, Web of Science, Scopus, PubMed and Semantic Scholar
Nick Haupka, Jack H. Culbert, Alexander Schniedermann +2
The assignment of document and publication types in scholarly databases plays an important role in bibliometrics, for example in decision-making or university rankings. However, sc…
How open are hybrid journals included in transformative agreements?
Najko Jahn
The ongoing controversy surrounding transformative agreements, which aim to transition subscription-based journal publishing to full open access, highlights the need for large-scal…
Reference Coverage Analysis of OpenAlex compared to Web of Science and Scopus
Jack Culbert, Anne Hobert, Najko Jahn +4
OpenAlex is a promising open source of scholarly metadata, and competitor to established proprietary sources, such as the Web of Science and Scopus. As OpenAlex provides its data f…
Understanding differences of the OA uptake within the German university landscape (2010-2020). Part 1: journal-based OA
Niels Taubert, Anne Hobert, Najko Jahn +2
This study investigates the determinants for the uptake of Full and Hybrid Open Access (OA) in the university landscape of Germany. It adapts the governance equaliser as a heuristi…
No Deal: Investigating the Influence of Restricted Access to Elsevier Journals on German Researchers' Publishing and Citing Behaviours
Nicholas Fraser, Anne Hobert, Najko Jahn +2
In 2014, a union of German research organisations established Projekt DEAL, a national-level project to negotiate licensing agreements with large scientific publishers. Negotiation…