This paper investigates the effectiveness of antitrust policy in fighting horizontal collusion under different regimes of policy implementation. We consider two regimes : a public agency regime, where an antitrust authority is in charge of competition policy, and a "delegation" regime, where the...

In a simple economic setting with asymmetric information we compare different social insti- tutions which fight against industry cartels on prices. Firstly, we analyse the case where an Antitrust Authority is created and we distinguish two situations depending whether the agency has the...

In a two period model with asymmetric information we study the optimalantitrust policies carried out by a public agency faced with firms'horizontal price-fixing behaviour. We analyse the effect on social welfare in case the Antitrust Authority decides to bind itself to follow the same policy, an...