And there is indeed a lot of work going on in the relevant institutions, such as CEBS or BSC. Some examples may justify this claim:  BIS Review 45/2006  5  (i)  The implementation of the CRD, which I have mentioned, will strengthen the ties between home and host country supervisors and foster the coordinating role of home-country supervisors.
(ii)  The European Commission has launched an initiative to eliminate existing barriers to cross-border mergers with consequences for the supervisory approval process as well as home and host-country interactions.