“…From an institutionalist perspective, however, important scepticism has been raised, for instance by Streeck (1998), due to the persistence of major differences and even incompatibilities between national institutions. It is apparent that such an issue is particularly relevant at the sector level, given that the impact of the European single market and of EU regulations vary by sector, and that a specific effort has been made to develop sector-level European social dialogue, but in a rather uneven way (Keller and Sörries, 1998;Marginson, 2005;Pochet et al, 2009). For instance, the steel sector has been 'Europeanised' since the European Coal and Steel Community came into effect in 1952, whereas some service sectors, such as hairdressing, have remained localised with little or no transnational influences until recently.…”