Tax Harmony, EU Fracas

What would a supermarket do if a rival down the road reduced its prices to bring in more business? Doubtless it would sell its goods more cheaply to keep its customers loyal. So you’d think Europe’s high-tax countries, which are losing investment and jobs to low-tax neighbors, would try to do the same: cut spending and trim taxes so their companies won’t be tempted to move abroad. But such market-...