Areeda and Turner (1975) were the first to argue that a price below marginal costs should be considered a sign of predation. Recognizing that marginal cost data were typically unavailable, the authors concluded that a price below average variable cost should be presumed unlawful. This so-called...

We analyse a market where newspaper publishers compete for advertising as well as for readership. Publishers first choose the political position of their newspaper then set cover prices and advertising tariffs. We build on the duopoly model of Gabszewicz et al. (2001, 2002) who show that...