This paper investigates dynamic process innovation in a product differentiated market where firms can reinvest present profits to reduce future costs. The focus is set on the market performance when the number of competing firms is determined by a social planner. The main contribution consists...

We study the implementation of 'reasonably efficient operator' margin squeeze tests by National Regulatory Authorities in European telecommunications markets. We provide a theoretical framework in which we show how regulatory authorities deal with the asymmetries between entrants and incumbents...

Telecommunications industry requires a high and steady level of investments in successive generations of equipments to cope with the exponential growth of traffic volumes. This paper argues that in this context, only imperfections of competition provide market players with the necessary margins...

Network neutrality constitutes today an emerging branch of economic analysis. This article explores this literature to open the discussion to new economic issues observed from the industry's practical experience that have not been yet addressed by the existing literature

This paper analyses the effects of banning pricing policies that lead to margin squeezes when the upstream good is imperfectly regulated. The analysis relies on a modelling with a vertically integrated upstream monopolist that faces competition by an unintegrated downstream competitor. It shows...