Media Bias by the Numbers: Challenges and Opportunities in the Empirical Study of Partisan News

Partisan bias in the news is a perennial matter of concern and debate for scholars, journalists, politicians, and citizens. Although there are abundant opinions about the magnitude, direction, and even existence of media bias, producing a scholarly consensus on the issue has proven difficult for several reasons. In particular, scholars studying media bias empirically must overcome problems of subjectivity, strategic behavior by the actors involved in the process, and especially the absence of suitable baselines against which to assess bias. This article reviews some approaches to studying media bias and explores several promising strategies and tools scholars have developed to help overcome these obstacles. I conclude with suggestions for future research in the area.