EVEN her enemies admire the bloody-mindedness of Margrethe Vestager, the European commissioner in charge of competition policy. Last autumn, not long after she had ordered Apple to pay €13bn ($14.5bn) in back-taxes to Ireland, to the fury of many in America, she flew across the Atlantic on a charm offensive. The Americans were not charmed; Ms Vestager was unmoved. Buckling up for the flight home, she tweeted that she had never felt so European.

Since she assumed her current role in November 2014, Ms Vestager has had several high-profile clashes with American tech firms. In May she fined Facebook €110m for misleading EU trustbusters about its takeover of WhatsApp, a messaging service. In June a long-running investigation resulted in a €2.4bn fine on Google for using its search engine to promote its own comparison-shopping service. EU trustbusters have also charged Google with using its Android operating system to promote its mobile-phone apps and services over those of rivals. That...Continue reading