How far will Google go to head off the threat of long and damaging antitrust battles on both sides of the Atlantic – and how hard will regulators push to cramp its expansive style?

The answers to those questions should become clearer in the next few weeks, as the European Commission and the US Federal Trade Commission press the company for voluntary changes in its business model to end their antitrust investigations. Rivals want radical action, perhaps even extending to a break-up of Google into separate companies that handle search and other services. The likely outcome, though, is more minimalist.