"A Measure of Media Bias" is a research study headed by Tim Groseclose (formerly of the Department of Political Science, UCLA; currently a professor of economics, George Mason University) and Jeff Milyo (Department of Economics, University of Missouri).

The study authors measured media bias by estimating ideological scores for several major media outlets. Here is a summary of the paper.

The full report was published in the November 2005 issue of the Quarterly Journal of Economics. See also UCLA press coverage.