This paper studies horizontal mergers in vertically related markets. In a two-level Cournot model, with an intermediate and a final market, we show that downstream mergers inducing size effects are, ceteris paribus, more profitable than upstream ones. Moreover, a merger at one level reduces the...

In Europe, competition authorities have the power to close antitrust cases with “commitment decisions” after the concerned firms have offered agreed remedies. We show that the optimal use of this instrument is governed by a tradeoff between deterrence of potentially anticompetitive practices...

</titre> Since the 1970?s, Algeria?s dependency on hydrocarbons has dramatically increased. In the last decade, this sector has represented more than 40% of GDP. The country suffers from Dutch disease symptoms such as deindustrialization and increases in prices of non tradable goods and services, and...

This article attempts to determine the optimal antitrust policy against price-fixing when competition authorities imperfectly observe firms' behaviour. By investigating or auditing on markets, authorities can detect collusion. We show that the strenght of investigations depends on the...

We analyze the incentives for a controlling shareholder to acquire silent or controlling shares in a competitor. When it occurs, the acquisition is detrimental to minority shareholders of his firm, or to the target, or even to both. The ownership structure of firms turns out to be a key...