Dewenter, Ralf

We investigate if four leading, electronic news gathering organizations in the US - ABC News, CBS News, FOX News, and NBC News - fulfill their role as the fourth estate in the US democracy. Our analysis, using the Political Coverage Index (PCI) introduced by Dewenter et al (2020), is based on the tonality of their political coverage using 815,000 human-coded news items from 2001 through 2012. For our econometric analysis, we use panel regressions with media and time fixed effects. To account for endogeneity, we cut time spans around national elections out of our data. In the remaining data, elections can be seen as a purely exogenous event. Focusing on the entire media set, we find robust empirical results for an anti-government bias in media reporting: Under Republican presidents, political coverage tends to be more liberal, whereas it tends to be more conservative if the president is a Democrat. However, when focusing on each single news organization, interesting differences emerge: For CBS News and NBC News, we find robust empirical evidence of anti-government-bias. In contrast, FOX News is always much more critical of Democrats than of Republicans. Hence, FOX News can be seen as a more loyal servant to one party rather than acting as the fourth estate. In addition, we find no evidence that ABC News significantly changes its position depending on the presidency. Although descriptive statistics show a certain tendency toward government-critical reporting by ABC News, the variation is not statistically significant.

As the rise of populist and right-wing political movements is connected to extensive media coverage, the question arises whether media report more on political parties because of their success or if their success is caused by media reports. To tackle this question, we investigate how media coverage affects short- and long-term political preferences, namely party affiliation and voting intention. For our empirical analysis, we merge 14 years of human-coded data obtained from leading media in Germany with results of the comprehensive German Politbarometer survey from February 1998 through December 2012. To account for endogeneity, we employ instrumental variable estimations. In addition, we control for a multitude of (internal) personal characteristics, such as age, and gender, as well as for (external) macroeconomic variables, such as business climate, unemployment, and inflation. The results show that media coverage of a political party has a positive and significant effect on the shortterm voting intention for this party. When media outlets cover a political party more positively, the electorate has a greater tendency to vote for it. However, for long-term party affiliation, the effect vanishes. This is consistent with the economic theory. Long-term preferences are stable and, thus, contemporary events, such as media coverage, hardly affect supposedly stable preferences. However, in the long-term, party affiliation might also be affected.

This contribution introduces a new direct measure of political media bias by analyzing articles and newscasts with respect to the tonality on political parties and politicians. On this basis we develop an index sorting the media in the political left to right spectrum. We apply the index to opinion-leading media in Germany, analysing 7,203,351 reports on political parties and politicians in 35 media outlets from 1988 to 2012. With this approach, in contrast to other indexes, we are able to achieve a more direct and reliable measure of media bias. In addition, we apply the index to study whether the media fulfil their role as the fourth estate, i.e. provide another level of control for government, or whether there is evidence of government capture.

This contribution introduces a new direct measure of political media bias by analyzing articles and newscasts with respect to the tonality on political parties and politicians. On this basis we develop an index sorting the media in the political left to right spectrum. We apply the index to opinion-leading media in Germany, analysing 7,203,351 reports on political parties and politicians in 35 media outlets from 1988 to 2012. With this approach, in contrast to other indexes, we are able to achieve a more direct and reliable measure of media bias. In addition, we apply the index to study whether the media fulfil their role as the fourth estate, i.e. provide another level of control for government, or whether there is evidence of government capture.

A wide range of media provide information on many products based on reviews or expert opinions. The effects of such information on product sales is analyzed in a small but growing literature in economics and marketing science. However, there is much more coverage on companies and products in the media than product reviews and expert opinions. Based on a unique dataset, we test whether coverage of car manufacturers in opinion leading media have significant impact on registrations of new cars in Germany. We find that positive (or at least neutral) media coverage has statistically significant effect on the number of new cars sold by several leading manufacturers on the German car market.