“…Eectiveness has been linked, among other things, to the ability of international adjudicators to forge compliance partnerships with national judiciaries (Keohane et al, 2000;Downs et al, 1996;Huneeus, 2013). In what is arguably the world's most deeply integrated international regime, the European Union, close cooperation between EU courts and national courts is widely credited for creating the conditions that have allowed the eective enforcement of EU laws and regulations in the domestic realm (Gabel et al, 2012; Stone Sweet, 2004;Sweet and Brunell, 1998b). By introducing a formal procedure for domestic judges to refer legal questions directly to the European Court of Justice, the institutional architecture put in place by the Rome Treaty is viewed as central to the process that led to the integration of domestic and EU legal systems.…”