APC trends for gold and hybrid OA uncovered: Analysis of anunpublished, longitudinal dataset of list-price APCs for 7.000 hybrid journals collected by the oa.finder

Since 2021 the oa.finder displays information on list-price APCs for around 5.000 pure OA journalsas derived from the DOAJ and more than 6.000 hybrid journals that come from an own longitudinaldata collection. The later increased over time adding more publishers and hybrid journals to thecollection. All APCs are converted at the historical spot rates to Euro. This unpublished data set—observing list-price APCs of currently 7.000 hybrid journals from thirteen traditional publishers,among them the big ones as Wiley, Springer Nature, Elsevier as well as small publishers like JohnBenjamins Publishing and Duncker the price index for hybrid OA APCs as a counterfactual analysis: How much wouldhave the prices increased if all articles had been published open access without applying read &publish agreements? The poster shows the price trends and compares the rates with the HICP forthe euro area.The Bielefeld University Library has developed the oa.finder as part of the project open-access.network.The web service contains information on around 57,000 international journals as well as informationon over 80 scientific publishers for OA books in Germany, Austria and Switzerland.