As I already mentioned, the ongoing process of giving the EU a constitution is also linked, at least in part, to enlargement. Within the realm of central banking, the Eurosystem has been engaged since 1999 in a constructive dialogue with the central banks of accession countries.
In addition, a foreign policy expansion might not require a domestic response that fully neutralises the exchange rate movement if there are sources of overall positive spillovers, in particular through increased foreign demand. Objectives in terms of inflation and output gaps can then be achieved despite some currency appreciation.