The Perrenial Euro Story (or lack of it)

Brad Setser has a post, the perrenial dollar story, which IMHO, has one large and significant ommission: it doesn’t really mention the euro. Personally I don’t really see how you can consider the future evolution of the dollar without taking the euro into account. This realisation provoked a rather long comment from me on Brad’s blog, and it is this comment, in a slightly modifed form, that I am now posting here. (Update: incidentally, I notice that Claus Vistessen has two highly relevant summaries of the great greenback debate (here, and here) which. among other things, serve as an excellent introdiction to the issues involved).
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