Edited sentence: In work with Kevin Hassett at the American Enterprise Institute, they provided a systematic measure of media bias.Their results suggest that American newspapers tend to give more positive news coverage to the same economic news when Democrats are in the Presidency than for Republicans.They solved the problem of how to objectively measure what the actual news story was and then obtain an objective measure of how it was covered by newspapers.When all types of news are pooled into a single analysis, their results are highly significant