The article examines a differentiated-products duopoly model where the firms make entry decisions to two markets and … then choose prices. The effects of product differentiation and entry costs are analyzed in two games: with and without … price discrimination between the markets. Allowing price discrimination encourages more entry and tends to reduce prices and …

. High access charges may make the firms collude on high prices. Moreover, when allowing for entry, we show that incumbents …

between market size and entry. …

higher with linear contracts than with two-part tari¤s. We also analyze the effects of endogenous entry on welfare. …

) attempt to block Skype's entry on their networks, some actually welcome it even if it apparently conflicts with their … symmetric (where Skype's entry is either accommodated or blocked by both MNOs) or asymmetric (where only one has the incentive …-off) relative to the one where entry is blocked. …

We study a dynamic model with an incumbent monopolist and entry in every subsequent period. We first show that if all …

We study competition in experimental markets in which two incumbents face entry by three other firms. Our treatments … vary with respect to three factors: sequential vs. block or simultaneous entry, the cost functions of entrants and the … amount of time during which incumbents are protected from entry. Before entry incumbents are able to collude in all cases …