In 2003, the dominant former monopolist, which was subject to a stringent price regulation, and the new entrant in the local calls market of Korea made an agreement in which the entrant was to raise the price while the incumbent was to hand over market shares or transfer money using...

We consider a monopolistic supplier's optimal choice of wholesale tariffs when downstream firms are privately informed about their retail costs. Under discriminatory pricing, downstream firms that differ in their ex ante distribution of retail costs are offered different tariffs. Under uniform...

This paper analyses a model of vertical product differentiation with one incumbent and one entrant firm. It is shown that if firms can produce only one quality level welfare in this entry game can be lower than in monopoly. This is the case if qualities are strategic complements because the...