“…Thus far, peer effects have primarily been studied for compulsory education, such as kindergarten (Chetty et al, 2011), elementary school (Gottfried, 2013), lower-secondary school (Balestra, Eugster, and Liebert, 2020;Balestra, Sallin, and Wolter, 2021) and high school (Lavy, Silva, and Weinhardt, 2012). The impact of grade repeaters on their peers investigated solely in compulsory schooling classes consistently finds negative short-run effects (e.g., Lavy, Paserman, and Schlosser, 2012;Gottfried, 2013;Hill, 2014;Bietenbeck, 2020;Xu et al, 2022).…”