Regulating former telecommunications monopolies has often been legally and technically complex. Among other options, incumbent operators were mandated to share, sell or split their infrastructure thus encouraging market entry. Given the importance of broadband technologies, competitive access...

In a firm model of vertical product differentiation, three distinct patterns of market shares emerge as an equilibrium outcome, reflecting three distinct strategies in respect of timing of the introduction of new products. The main novelty, relative to the existing literature on vertical product...

The study analyses the market for semiconductor memory chips, in particular EPROMs. Semiconductors are very interesting industry for studying empirically the dynamics of innovation. Given the short product life cycles of generations of chips, the market dynamics unfold much more rapidly than in...