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IJPP provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge. Articles in this journal are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0).
University of Groningen Press offers a publication platform for journals, books and other publications of faculties and researchers working at or with the University of Groningen. Our preferred model for publications is open access, so that any researcher or interested reader around the world can find and access the information without barriers.