Cameras-Press-MediaThirty years ago, the diversity of the world’s news media was broad. In 1983, some 50 companies owned “the media” in the U.S. and the world; obviously, with so many companies vying for listeners, viewers and readers, competition was intense — not just for audience but for advertisers as well. Fast forward to 2014: That field of media companies has been winnowed down to just a half-dozen companies: Time Warner, Disney, Murdoch’s News Corporation, Bertelsmann of Germany, Viacom (formerly CBS) and General Electric-owned NBC. More