Using micro data that have already been collected, it is comparatively simple to respond to a new request by carrying out an appropriate aggregation of the data. Looking ahead, the microdata approach to compiling statistics may even replace the traditional one, leading to cost-savings on the side of the reporting agents.
It would have to establish its own Reserve Bank for a start, and would have to accept additional transactions costs for cross-border transactions with other regions, which would probably inhibit trade and investment flows with other regions in its own country. Very small currency areas have also often got into trouble over the years.