131 citations · 347 across the 11 of their papers we have counts for
11 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 Germany university landscape (2010-2020) -- Part 2: repository-provided OA
Niels Taubert, Anne Hobert, Najko Jahn +2
This study investigates the determinants for the uptake of institutional and subject repository Open Access (OA) in the university landscape of Germany and considers three factors:…
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…
Transparency to hybrid open access through publisher-provided metadata: An article-level study of Elsevier
Najko Jahn, Lisa Matthias, Mikael Laakso
With the growth of open access (OA), the financial flows in scholarly journal publishing have become increasingly complex, but comprehensive data and transparency into these flows…
Comment on "Open is not forever: a study of vanished open access journals"
Matan Shelomi
We comment on a recent article by Laakso et al. (arXiv:2008.11933 [cs.DL]), in which the disappearance of 176 open access journals from the Internet is noted. We argue that one rea…
Open is not forever: a study of vanished open access journals
Mikael Laakso, Lisa Matthias, Najko Jahn
The preservation of the scholarly record has been a point of concern since the beginning of knowledge production. With print publications, the responsibility rested primarily with…
Open Access -- Towards a non-normative and systematic understanding
Niels Taubert, Anne Hobert, Nicolas Fraser +2
The term Open Access not only describes a certain model of scholarly publishing -- namely in digital format freely accessible to readers -- but often also implies that free availab…