Representative Press Blog

Here is a study by Geoffrey Nunberg that looks at Use of Political Labels in Major Newspapers

See also:
The numbers confirm what Michael Dolny has shown in a series of annual studies for the group Fairness and Accuracy in Reporting (FAIR): Reporters' Rolodexes stop three times as often at the names of conservative think tanks as at the names of liberal think tanks. The Think Tank Spectrum: For the Media, Some Thinkers Are More Equal Than Others