Dear colleagues and members of the EPSA Mailinglist, We invite you to participate in the GLES Open Science Challenge 2021<https://gles-en.eu/gles-open-science-challenge-2021/>, coordinated by The German Longitudinal Election Study (GLES<https://gles-en.eu/gles-open-science-challenge-2021/>), in collaboration with the journal German Political Science Quarterly (PVS<https://www.springer.com/journal/11615>) and the German Society for Electoral Studies (DGfW<http://www.dgfw.info/en/>). The Special issue will be published in English. We invite open topic studies in the form of Registered Reports<https://osf.io/rr/> that employ 2021 GLES survey data to examine relevant questions in times of political change and crises surrounding the German federal election: After 16 years of Angela Merkel as chancellor, these elections mark a watershed in German politics. The race for her successor is wide open. Simultaneously, it is unclear how long the Covid-19 pandemic and its corresponding restrictions will dominate the political agenda in Germany. Deadline for abstract submission (500 words): July 12, 2021 * Study materials, questionnaires and guidelines are now available online<https://gles.eu/gles-open-science-challenge-2021/downloads/>. This call will be of particular interest to scholars who value rigorous and transparent research and early career researchers interested in a fast publication pathway where success depends on the novelty, theoretical relevance, and rigorous execution of a research idea rather than the eventual empirical results. More details can be found in the attached Call for Papers and on our website<https://gles-en.eu/gles-open-science-challenge-2021/>. If you have any questions or informal inquiries, please do not hesitate to contact me or the Editorial Team<mailto:gles-osc@gesis.org>. Best Regards on behalf of the Editorial Team, Hannah Bucher ______________________________________________ Hannah Bucher German Longitudinal Election Study(GLES) GESIS - Leibniz Institute for the Social Sciences P.O.Box 12 21 55 | D-68072 Mannheim Phone: +49(621)-1246-432 Mail: Hannah.Bucher@gesis.org<mailto:Hannah.Bucher@gesis.org>