If there’s any universally accepted truth among data-driven marketers, it’s that ad placements based on individual data are more effective than placements based on context (i.e., the publication where an ad appears).

Another perennial challenge that suddenly seems to have many solutions is measuring the impact of advertising on retail sales. Nielsen Catalina Solutions, which combines Nielsen TV viewing data with Catalina’s retail purchase information, has just launched new variation of its service. This one is focused on measuring the combined impact of ads viewed on different types of TV and video devices.

A U.S. district court judge has ruled that Google acted to create illegal monopolies in online advertising technology in a way that blocked competition and allowed higher ad prices to be charged. Google will appeal; meantime, the government will decide what to ask the court to do to remedy the monopoly. Google also faces a new U.K. antitrust lawsuit over its dominance of search.