“…Our findings contribute to the literature on identity and bias (e.g., Zussman, 2011, 2017 among others). They also contribute to the literature on contests (Konrad, 2009), where they are biased (Chowdhury et al, 2023) or an official is present (Breig and Kubitz, 2021), and on behavioural biases in policy issues around contests (e.g., Baharad and Nitzan, 2008). Our findings specifically contribute to the literature that focuses on the role of nationality and group identity in the bias of officials in sport (e.g., for football see Dawson and Dobson, 2010;Dagaev et al, 2021;Faltings et al, 2023;Pope and Pope, 2015;Principe and van Ours, 2022; and for sports involving panels of judges see Coupe et al, 2018;Krumer et al, 2022;Sandberg, 2018;Zitzewitz, 2006).…”