We study a major new entry in the French mobile telecommunications market, followed by the introduction of fighting brands by the three incumbent firms. Using an empirical oligopoly model with differentiated products, we show that the incumbents' launch of the fighting brands can be rationalized...

The purpose of this article is to identify which, if any, segments of the movie business have suffered from digital piracy. We use a sample of 620 university members including undergraduate students, graduate students and professors to assess the effect of digital piracy on legal demand. A large...