The economies of southern and northern Europe make strange bedfellows

SINCE bond investors began to discriminate between the euro-zone economies, pushing yields on Spanish, Irish, Greek, Italian and Portuguese government debt soaring, much of the talk in northern Europe has been of profligate governments in the south. As these indicators show, the euro zone's problems go rather deeper than that. A large chunk of the single-currency area has a chronic competitiveness problem, with a horrible mixture of high unemployment, low productivity and low investment. One unsolved mystery is why all this ought to have some correlation with latitude. Answers to the Bundesbank, please.