This paper develops an original model of product differentiation, to contribute to the debate about theregulation and finance of public television. It goes beyond the conventional analysis in this topic, byshowing the spill-over effects that a public broadcaster can have upon commercial...

This paper develops an original model of product differentiation, to contribute to the debate about the regulation and finance of public television. It goes beond the conventional analysis in this topic, by showing the spillover effects that a public broadcaster can have upon commercial...

Looking at a large number of markets, I find that (i) prices and variety are higher when there are two competing supermarkets than in those with a single store and (ii) the two effects are positively correlated. This pattern persists after controlling for differences across markets in a variety...