This sums thing up quite nicely:
Quote:
In other words, the study rests on a presumption that can only be described as bizarre: If a member of Congress cites a think tank approvingly, and if that think tank is also cited by a news organization, then the news organization has a "bias" making it an ideological mirror of the member of Congress who cited the think tank. This, as Groseclose and Milyo define it, is what constitutes "media bias."
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