We study the competitive forces that shaped ideological diversity in the US press in the early twentieth century. We find that households preferred like-minded news and that newspapers used their political orientation to differentiate from competitors. We formulate a model of newspaper demand,...

This paper, "Competition and Ideological Diversity: Historical Evidence from US Newspapers" to which these Appendices apply is available at the following URL: "http://ssrn.com/abstract=2191104" http://ssrn.com/abstract=2191104

We use data on US newspapers from the early 20th century to study the economic incentives that shape ideological diversity in the media. We show that households prefer like-minded news, and that newspapers seek both to cater to household tastes and to differentiate from their competitors. We...

We study the competitive forces that shaped ideological diversity in the US press in the early twentieth century. We find that households preferred like-minded news and that newspapers used their political orientation to differentiate from competitors. We formulate a model of newspaper demand,...

News media operate in two-sided markets, offering bundles of content to readers as well as selling readers' attention to advertisers. Technological innovations in content delivery, such as the advent of broadcast television or of the Internet, affect both sides of the market, threatening the...

News media operate in two-sided markets, offering bundles of content to readers as well as selling readers' attention to advertisers. Technological innovations in content delivery, such as the advent of broadcast television or of the Internet, affect both sides of the market, threatening the...

Models of firm conduct are the cornerstone of both theoretical and empirical work in industrial organization. A recent contribution (Berry and Haile, 2014) has suggested the use of exclusion restrictions to test alternative conduct models. We propose a pairwise testing procedure based on this...