For central banks in particular, there has been talk about spillovers from monetary policy settings being “internalised” into individual central banks' framework for decision making. Exactly how that might be done is not entirely clear, and discussion is in its infancy; a consensus is yet to emerge.
The IMF does useful work on spillovers and the IMF offers, at least in principle, a forum where incompatibilities can be at least recognised and discussed. One more far reaching proposal is for there to be an “international monetary policy committee”. 17 That seems a long way off at present.