I just listening to Eli Noam giving a talk that claimed that Google was the world’s largest media company. The big PDF appears to be the base presentation he was working off. The slide that he used showing Google to be the largest media company, had Time Warner and Telecom Italia in it. He made references to HHI, but it is not clear how he claims that Google (a search engine and advertising company), Time Warner (a media and cable company) and Telecom Italia (a telecom company) can be in the same market and how their market shares can be calculated. When I questioned this, I was advised that the methodology is in two books, one for the US and one for the rest of the world.