Keeping world-leading international law resource听open access

罢丑别鈥 has reached its goal for renewals and will continue to publish on a Subscribe to Open model, through to at least March 2027.
罢丑别听Max Planck Encyclopedia of Public International Law听is听the leading resource in the field,听containing听peer-reviewed articles on every aspect of international law鈥攁听discipline听which听provides a common legal framework for the鈥痺hole world.
By converting听this听comprehensive, analytical resource听to听an open access,听Subscribe to Open model,听we听have made it possible for students, scholars, practitioners, and governments听worldwide听to access this content freely without financial barriers.鈥
Subscribe to Open in practice听
罢丑别听Max Planck Encyclopedia of Public International听Law听is听OUP鈥檚听first experiment with the Subscribe to Open model – a model听typically applied to journals rather than books. Thanks to the support of our听institutional and library听customers, this valuable content is freely accessible听to all听for a second year.
As a result of the听Subscribe to听Open model, usage of the encyclopaedia has increased听substantially听from听2024 to 2025:
- An increase in usage by 1,291%
- An鈥痠ncrease in usage鈥痜rom low- and middle-income countries鈥痓y听556%听鈥
- Access from鈥痷sers in听235 鈥痙ifferent鈥痶erritories around the world, an听increase听from 199,听including听all听196 United Nations member states.
Professor Anne Peters, Director at the Max Planck Institute for Comparative Public Law and International Law, Heidelberg, and General Editor of听the鈥Max Planck听Encyclopedia听of Public International Law, said:
鈥淲e are delighted to have this opportunity to听participate听in a pioneering听open听access听project, particularly in view of the foundational role played by the Max Planck Society in launching the move towards open scholarship.听Open听access听can contribute to epistemic justice and pluralism鈥攁nd what we call 鈥渆ncyclopaedic knowledge鈥 should not only be distributed听freely, but听also be built up from a globally diverse set of standpoints.鈥听
Rhodri Jackson, Director of Open Access Publishing and Strategy, shared:
鈥Innovation in open access models is in line with our mission: not only to publish excellent research and scholarship but to make it available worldwide. We are committed to learning from all our initiatives鈥攕uccessful and less successful鈥攁nd to sharing our results transparently. The first year of Subscribe to Open for the Max Planck Encyclopedia of Public International Law has been a great success and we鈥檙e excited to see what happens in year two.鈥
While听we have reached our goal for renewals this year, we still need to reach our renewal goals annually to keep this resource听open access. By renewing your subscription, you help to ensure that this valuable resource听remains听open and accessible to all, year after year.
Find more information, including about renewals, .