-horizon, discrete-time game. Our goal is to identify the Markov perfect stationary equilibria where the seller can maintain his monopoly … power. We establish that the set of parameters supporting a monopoly outcome is larger when the seller offers different … quality versions of the same product. Hence, our results suggest that, when the innate durability of a product is high, the …

Stock Exchange. Frequent buy-outs increased the monopoly power of companies involved. The Greek ferry system was a par … measure of monopoly power was calculated, based on the work of Lerner, Herfindahl and Hirschman, known as the "Hirschman …) Piraeus-Cyclades. These show a distinct pattern of oligopoly/monopoly, with the traffic concentrated in a small group of …