Martin Wolf has an important column today on how to save the euro:

If the current policies seem unlikely to work and either a federal or a transfer union is ruled out on grounds of political or economic infeasibility, what is left? I suggest the combination of two ideas: “insurance union” and “adjustment union”. By an insurance union, I mean one that provides temporary and targeted support for countries hit by big shocks. By an adjustment union, I mean one that ensures symmetrical adjustment to changes in circumstances, including, changes in financing. Both are necessary and, together, they should be sufficient to ensure a workable union in the long run. These notions would have been unnecessary if original members had been far more similar: the minimal union would then have worked. But that is not what now exists. If the eurozone is to sustain its current membership, it needs a combination of insurance and adjustment.

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