Najko Jahn
Biographic Data
| ID | 8970403 |
|---|---|
| NAME | Najko Jahn |
| GIVEN NAMES | Najko |
| FAMILY NAME | Jahn |
| SIGNATURE | JAHN N |
| AFFILIATIONS | Niedersächsische Staats-und Universitätsbibliothek Göttingen |
| ORCID | 0000-0001-5105-1463 |
| VERIFIED | Yes |
| TOTAL WORKS | 8 |
| TOTAL CITATIONS | 0 |
| AUTHOR COUNT | 8 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2021 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 0 |
Estimating transformative agreement impact on hybrid open access
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 databases Scopus and Web of Science to estimate the impact of transformative agreements on hybrid open access publishing. Analysing over 13,000 hybrid journals between 2019 and 2023, the research found substantial growth in open access due to these agreements, although mos…
Analysis of the publication and document types in OpenAlex, Web of Science, Scopus, PubMed and Semantic Scholar
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, scholarly databases apply different curation strategies and taxonomies when classifying documents, which makes it difficult to compare results from different database providers. In this study, the academic literature databases OpenAlex, Web of Science, Scopus, PubMed, and…
Reference coverage analysis of OpenAlex compared to Web of Science and Scopus
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 freely and openly, it permits researchers to perform bibliometric studies that can be reproduced in the community without licensing barriers. However, as OpenAlex is a rapidly evolving source and the data contained within is expanding and also quickly changing, the quest…
How open are hybrid journals included in transformative agreements
The ongoing controversy surrounding transformative agreements, which aim to transition subscription-based journal publishing to full open access, highlights the need for large-scale studies assessing the impact of these agreements on hybrid open access. By combining multiple open data sources, including cOAlition S Journal Checker, Crossref, and OpenAlex, we present a novel approach that analyzes over 700 agreements. Results suggest a strong grow…
Understanding differences of the OA uptake within the German University landscape (2010–2020)
This article is the second part of the investigation of the determinants for the uptake of Open Access (OA). While the first part focusses on journal-based OA (hybrid and full OA) (Taubert et al. in Scientometrics 128(6):3601–3625, 2023), the article at hand investigates the determinants for the uptake of institutional and subject repository OA in the university landscape of Germany. Both articles consider three types of factors: the disciplinary…
Understanding differences of the OA uptake within the German university landscape (2010–2020)
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 combinin…
No deal
In 2014, a union of German research organizations established Projekt DEAL, a national-level project to negotiate licensing agreements with large scientific publishers. Negotiations between DEAL and Elsevier began in 2016, and broke down without a successful agreement in 2018; during this time, around 200 German research institutions canceled their license agreements with Elsevier, leading Elsevier to restrict journal access at those institutions…
Open access uptake in Germany 2010–2018
This study investigates the development of open access (OA) to journal articles from authors affiliated with German universities and non-university research institutions in the period 2010–2018. Beyond determining the overall share of openly available articles, a systematic classification of distinct categories of OA publishing allowed us to identify different patterns of adoption of OA. Taking into account the particularities of the German resea…
No prominent works on this page.
Open access uptake in Germany 2010–2018
This study investigates the development of open access (OA) to journal articles from authors affiliated with German universities and non-university research institutions in the period 2010–2018. Beyond determining the overall share of openly available articles, a systematic classification of distinct categories of OA publishing allowed us to identify different patterns of adoption of OA. Taking into account the particularities of the German resea…
Understanding differences of the OA uptake within the German university landscape (2010–2020)
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 combinin…
No deal
In 2014, a union of German research organizations established Projekt DEAL, a national-level project to negotiate licensing agreements with large scientific publishers. Negotiations between DEAL and Elsevier began in 2016, and broke down without a successful agreement in 2018; during this time, around 200 German research institutions canceled their license agreements with Elsevier, leading Elsevier to restrict journal access at those institutions…
Understanding differences of the OA uptake within the German University landscape (2010–2020)
This article is the second part of the investigation of the determinants for the uptake of Open Access (OA). While the first part focusses on journal-based OA (hybrid and full OA) (Taubert et al. in Scientometrics 128(6):3601–3625, 2023), the article at hand investigates the determinants for the uptake of institutional and subject repository OA in the university landscape of Germany. Both articles consider three types of factors: the disciplinary…
Reference coverage analysis of OpenAlex compared to Web of Science and Scopus
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 freely and openly, it permits researchers to perform bibliometric studies that can be reproduced in the community without licensing barriers. However, as OpenAlex is a rapidly evolving source and the data contained within is expanding and also quickly changing, the quest…
How open are hybrid journals included in transformative agreements
The ongoing controversy surrounding transformative agreements, which aim to transition subscription-based journal publishing to full open access, highlights the need for large-scale studies assessing the impact of these agreements on hybrid open access. By combining multiple open data sources, including cOAlition S Journal Checker, Crossref, and OpenAlex, we present a novel approach that analyzes over 700 agreements. Results suggest a strong grow…
Estimating transformative agreement impact on hybrid open access
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 databases Scopus and Web of Science to estimate the impact of transformative agreements on hybrid open access publishing. Analysing over 13,000 hybrid journals between 2019 and 2023, the research found substantial growth in open access due to these agreements, although mos…
Analysis of the publication and document types in OpenAlex, Web of Science, Scopus, PubMed and Semantic Scholar
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, scholarly databases apply different curation strategies and taxonomies when classifying documents, which makes it difficult to compare results from different database providers. In this study, the academic literature databases OpenAlex, Web of Science, Scopus, PubMed, and…
Research Data Management Practices (7 works) · scientometrics and bibliometrics research (7 works) · Computer Science (6 works) · Political science (5 works) · Geography (4 works) · German (4 works) · Library science (4 works) · Scopus (3 works) · Transformative learning (3 works) · Web of science (3 works)