We are delighted to release the Subscribe to Open (S2O) 2023 Transparency Report for our mathematics journals* co-published by EDP Sciences and the Société de Mathématiques Industrielles et Appliquées (SMAI). Following the announcement that the journals will continue to publish in open access in 2023, this report marks our third consecutive year of providing this comprehensive overview, reinforcing our commitment to transparency. By presenting a detailed analysis of metrics such as subscription prices, subscription renewals, costs, and usage data, it offers a comprehensive understanding of the effectiveness of the S2O initiative for these titles.

“By consistently providing this wealth of financial information and other metrics, our aim is to empower librarians and stakeholders with the necessary information to make well-informed decisions regarding the model," said Anne Ruimy, Senior Publisher for Mathematics titles at EDP Sciences. She added, "While we are making steady progress towards achieving financial sustainability, the program relies on the ongoing support of institutions to subscribe to the journals that are valued by their researchers."

The 2023 edition of the report goes beyond the metrics published in previous reports, providing more detailed insights into costs, usage data, and effects of S2O on downloads. Within the report, we update information on the partnership with Knowledge Unlatched, the exceptional revenue received from the Fonds National pour la Science Ouverte (FNSO) and the CNRS, as well as the invaluable contributions made by the Advisory Committee in governing the S2O program.

We invite you to explore the complete 2023 Transparency Report and more detailed information is available to interested libraries on request.

*The six mathematics journals published in open access in 2023 under the S2O programme are: ESAIM: Control, Optimisation and Calculus of Variations, ESAIM: Mathematical Modelling and Numerical Analysis, ESAIM: Probability and Statistics, Mathematical Modelling of Natural Phenomena, RAIRO – Operations Research and RAIRO – Theoretical Informatics and Applications. All the journals are published by EDP Sciences in partnership with SMAI except for RAIRO – Theoretical Informatics and Applications which is published by EDP Sciences only.

About S2O

Subscribe to Open (S2O) is an alternative, transformative model that aims to transition subscription journals to open access in a fair, equitable and sustainable way without Article Processing Charges (APCs). First introduced by Annual Reviews and later endorsed by cOAlition S, S2O has been embraced by a number of publishers who have come together in the S2O Community of Practice.This innovative model has quickly become an accepted approach for achieving open access and builds on collaborative initiatives such as SCOAP3 and Knowledge Unlatched.

Following the subscription renewal cycle, a journal joining the S2O programme will publish its newly accepted content in open access as soon as all subscription renewals have been received. Articles are published under a CC-BY 4.0 license which allows authors to retain the copyright and others to share and adapt the content.

The open access status of S2O journals is determined annually usually during the first quarter based on the level of subscriptions received.


For further information, contact:

Charlotte Van Rooyen

Director of Marketing and Communications, EDP Sciences

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