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...

In this paper we study the results of three well-known experiments on duopoly markets, in which participants played a repeated market game in similar experimental conditions.We address two different questions: which learning theory is better able to describe the players' decisions in the...

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...