Big U.S. Tech Firms Anxious About 'Brexit' Vote in EU

Tech firms have clashed with the EU on regulatory issues ranging from privacy to taxes to antitrust law. But ahead of a referendum on the U.K.’s continued membership in the EU, several technology executives and lobbyists said that the U.K.’s leaving the bloc could deepen those battles -- while creating new obstacles for them to do business in the U.K., too.