il lavoro tratta della determinazione della struttura di mercato prendendo in considerazione recenti modelli di oligopolio. Principalmente si focalizza sulle competizioni tecnologiche e sulla differenziazione del prodotto.

In this paper we analyze horizontal mergers in mixed oligopolies. We first consider a mixed duopoly where the merger creates a monopoly, and we distinguish two cases.

We model a duopoly with a private and a public firm under the hypothesis of vertical product differentiation. Firms choose their quality levels first and then prices. We ask which firm will choose to serve the higher (lower) segment of the market. When firms act simultaneously in each stage,...

We show that in a mixed duopoly under quantity competition, the public firm's reaction function may be upward sloping. This is the case under concavity of the demand function when the public firm attaches private profits a smaller weight than its own profits.

It is shown that in a mixed duopoly under quantity competition, the public firm's reaction function may be upward-sloping. This is the case with a concave demand function when the public firm attaches to private profits a smaller weight than to its own profits. Copyright 1995 by Blackwell...