... sub-state governments' involvement in international relations, through the establishment of formal and informal contacts, either permanent or ad hoc, with foreign public or private entities, with the aim to promote socio-economic, cultural or political issues, as well as any other foreign dimension of their own constitutional competences" (apud Setzer, 2013, p. 41) While some scholars have scrutinised the major city networks demonstrating their agency through collective action (Betsill and Bulkeley, 2004, 2007Gordon and Acuto, 2015;Hickmann, 2016), others explore their role in global climate politics and governance (Toly, 2008;Biermann and Pattberg, 2012;Acuto and Rayner, 2016;Bansard et al., 2017). Yet another group examines how transnational cooperation networks of cities empower local governments worldwide through knowledge and practice sharing (Bulkeley and Betsill, 2005;Betsill and Bulkeley, 2007;Andonova et al., 2009;Corfee-Morlot et al., 2009;Fischer et al., 2015;Gordon and Acuto, 2015;Hickmann, 2016). However, in most studies, empirical evidence derives from cases in the global North. ...