The aim of this paper is to complement the existing literature on horizontal mergers, by setting a Cournot mixed oligopoly model. Specifically, the merger paradox is qualified by proving that a merger could be profitable for the merging firms even if it does not include most market firms....

This paper is about a model of Bertrand competition in a homogeneous-good market with free entry of identical firms and variable returns to scale. If the optimum number of active firms in the market is two or more, and the number of active firms is equal to that optimum number, then Bertrand...

Taking as a reference a model in which there are a public firm, a national private firm and a foreign private one, it is analyzed both mergers sustainability and their relative effects on welfare. It is proved that the merger between the public firm and either the national or the international...