This paper offers a methodology to assess the internal productive efficiency of National Regulatory Authorities (NRAs) based on the performances of regulated markets, measured in terms of the degree of market efficiency (either static or dynamic). The estimation procedure is based on a Data...

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