Do National Economic and Political Conditions Affect Ideological Media Slant?

Abstract

Political scientists are interested in the influence of the news media on politics. However, relatively few studies investigate whether or not ideological slant in news coverage changes systematically over time. If it changes systematically, what factors explain the changes? This study argues that external conditions, such as national political and economic situations, influence ideological media slant at the aggregate level. To examine this argument, “macro media bias” is measured quarterly by gauging the relative size of liberal and conservative news stories regarding domestic issues from 1958 through 2004. Utilizing ARIMA models, this study reveals that the news media tend to negatively react to government spending. Also, economic conditions, such as unemployment and inflation, significantly explain changes in the relative number of liberal and conservative news stories. [Supplementary material is available for this article. Go to the publisher's online edition of Political Communication for the following free supplemental resource(s): the coding keywords, detailed coding rules, and alternative regression results.]