From www.chomsky.info: "Part of the reason why I write about the media is because I am interested in the whole intellectual culture, and the part of it that is easiest to study is the media. It comes out every day. You can do a systematic investigation. You can compare yesterday’s version to today’s version. There is a lot of evidence about what’s played up and what isn’t and the way things are structured.
My impression is the media aren’t very different from scholarship or from, say, journals of intellectual opinion—there are some extra constraints—but it’s not radically different. They interact, which is why people go up and back quite easily among them.

You look at the media, or at any institution you want to understand. You ask questions about its internal institutional structure. You want to know something about their setting in the broader society. How do they relate to other systems of power and authority? If you’re lucky, there is an internal record from leading people in the information system which tells you what they are up to (it is sort of a doctrinal system). That doesn’t mean the public relations handouts but what they say to each other about what they are up to. There is quite a lot of interesting documentation.

Those are three major sources of information about the nature of the media. You want to study them the way, say, a scientist would study some complex molecule or something. You take a look at the structure and then make some hypothesis based on the structure as to what the media product is likely to look like. Then you investigate the media product and see how well it conforms to the hypotheses. Virtually all work in media analysis is this last part—trying to study carefully just what the media product is and whether it conforms to obvious assumptions about the nature and structure of the media.

Well, what do you find? First of all, you find that there are different media which do different things, like the entertainment/Hollywood, soap operas, and so on, or even most of the newspapers in the country (the overwhelming majority of them). They are directing the mass audience.