Using the same "guilt by association" techniques that the professor uses in his paper, I conclude that he is far from unbiased. In fact, taking the average ADA score of the four groups in the previous paragraphs, which are all supported by the same foundations that have funded the professor in his research, results in a score that ranks the professor as more conservative than any of the news outfits in his rankings. More than the Drudge Report, more than Fox News' Special Report with Brit Hume, more even than the Washington Times.
Co-author Jeffrey Milyo was a Salvatori fellow for the ultra-right-wing (by their paper's own numbers!) Heritage Foundation. He and Groseclose wrote their first article together in 1996 for the far-right scandal sheet The American Spectator.