Najko Jahn

@najko.bsky.social

269 Followers 1058 Following

Data Analyst Scholarly Communications at State and University Library Göttingen , #scholcomm #rstats #bibliometrics #openaccess #openscience #lagotto

Leon Draisaitl with Bowie

Comparison of hybrid journal indexing by data source, 2019–2023. Only hybrid journals present in the cOAlition S Transformative Agreement Data dump with at least one open access article are considered. A presents the number of journals, B the number of articles (DOI), distinguishing between shared DOI corpus and surplus in hoaddata. Box plots C shows the 5-years journal article volume (log scale). Note that intersections sets with at least 30 journals are shown

SQL query used to obtain publication and DOI deposition dates for preprints using Crossref metadata, as provided by the SUB Göttingen open scholarly data warehouse.

Lagotto Alfons with ice cream

Development of open access in hybrid journals in transformative agreements by data source and author role, 2019-2023. Figure shows the open access percentage (A), the number (B) and the percentage (C) of open access articles enabled by transformative agreements.