This new work provides timely analysis of the cross-border exercise of banking activity in the EU and its supervision, from the perspective of the 'home-host rule'. It examines the current system and the efficacy of recent reforms considering whether the centralisation of decision making and a more effective mutualisation of financing tools could increase the efficiency of the EU banking system and reduce the asymmetry of information between home and host authorities. The EU banking market is very integrated since banking institutions based in the Union are free to perform their activities...