The Quarterly Journal of Economics, Vol. 126, No. 4, pp. 1799-1839, November 2011
Measures the degree of ideological segregation in the market for online news and compares this to other news sources.
Guaranteeing exposure to information from diverse viewpoints has been a central goal of media policy in the United States and around the world, including recently proposed net neutrality legislation.
The ideological segregation of online news—the degree to which liberals and conservatives are isolated from each other’s opinions-- is low in absolute terms.
The segregation of online news is higher than broadcast television news, cable television news, magazines, and local newspapers.
The segregation of online news is lower than national newspapers.
The segregation of online news is higher than a social network where individuals match randomly within counties, and lower than a network where they match randomly within ZIP codes.
Segregation of online news is significantly lower than in networks which people form such as work neighborhoods family), trusted friends, and political discussants.
There is no evidence from data since 2004 that the Internet is becoming more ideologically segregated over time.