A market-driven slant to journalism

Ben Compaine cites a National Science Foundation-funded study showing that it's the marketplace, not the ownership, that drives "slant" in news media. This makes perfect sense in a Darwinian way. Iconoclasts and polemicists may have their audiences, but you can't drift too far from the consensus and still maintain a big audience. So writers write and editors edit to the expectations of the community.