Steve Verdon links a working paper (an updated version of which will be presented at APSA in September) by political scientists Tim Groseclose and Jeff Milyo that attempts to quantify the partisan leanings of various media outlets on the basis of their reliance on think tanks for “neutral” information in straight-news stories. Estimated ADA scores for the think tanks are derived from their citations by politicians in the Congressional Record, which are then used to estimate ADA scores for the New York Times, the Los Angeles Times, USA Today, the Drudge Report, Fox News’ Special Report, and the three broadcast network evening newscasts.

I’ve only skimmed the paper so far, but this seems like a fairly sound approach to the problem. As for the results… well, unless your name is Eric Alterman, I doubt you’ll be very surprised.

Steve Verdon and I managed to scoop Matt Drudge on this working paper by Tim Groseclose and Jeff Milyo that attempts to quantify the bias of media outlets using the ADA scale. Where’s my gold star?

Meanwhile, James Joyner reacts to the paper itself. I agree that the method of using think-tank citations isn’t ideal, but I can’t come up with a better one offhand that allows you to put members of Congress and media outlets in the same measurement scale without a lot of a priori assumptions. (There are some other critiques at the Dead Parrot Society.)

Update: As Brock points out, Alex Tabarrok scooped us all. Story of my life.