Currency Unions After the Euro The world is full of currency schemes. SDRs, Khalijees, East African Shillings, Ecos, ASUs, and Tasman Dollars currently follow stages of gestation and quickening which would trouble St Thomas Aquinas, for example. There;s nothing, after all, that wrong with a currency union per se. I live in one; the purchasing value of the pound in London, the North, and the various parts of Cymru-Kernow varies, both between the regional areas and with regard to the Isle of Man, Scotland, and Northern Ireland, which all technically issue their own currency. I suppose since regional inflation is a given, regional real interest rates differ, but there is no mechanism for the difference to be expressed beyond regional differences in unemployment and government spending. From a London perspective, the thing seems to work reasonably well. You would have thought that the eurozone's ongoing crisis had poisoned the well of any less national schemes, but the world seems to h...