This paper presents a model of competition between an incumbent and an entrant firm in telecommunications. The entrant has the option to enter the market with or without having preliminary invested in its own infrastructure; in case of facility based entry, the entrant has also the option to...

We study how the migration from an old to a new technology is affected by the access price to the old technology. We show that both the incumbent and the regulator are willing to set a very high access price to accelerate consumers' migration to the new technology. When the quality of the old...

Despite a general trend of lower charges for mobile calls, in Europe prices for international roaming calls have remained at levels surprisingly high. The apparent reluctance of mobile network operators to lower roaming tariffs is generating many antitrust concerns. This paper presents in a two...

This paper considers a model with labor market frictions and monopolistic competition in the goods market. It also introduces proportional income taxation and unemployment benefits with a balanced government budget constraint. The paper evaluates the effects of more competition and higher...