The paper provides new evidence on proxy indicators of market power for major European countries. The data shows moderately increasing average industry concentration over the last two decades, a considerably increasing proportion of high concentration industries, and an overall tendency towards...

This paper analyzes the incentives that network operators have to invest in facilities with different levels of quality. We extend the framework of Armstrong-Laffont-Rey-Tirole by introducing an investment stage, prior to price competition, and we study the dynamic aspects of two-way access...