We consider an oligopolistic market where firms compete in price and quality and where consumers are heterogeneous in knowledge: some consumers know both the prices and quality of the products offered, some know only the prices and some know neither. We show that two types of signalling...

This paper shows how price leadership bans imposed, as part of the European Commission's State aid control, on all main mortgage providers but the largest bank shifted the Dutch mortgage market from a competitive to a collusive price leadership equilibrium. In May 2009, mortgage rates in The...

Institutional investors often own significant equity in firms that compete in the same product market. These "common owners" may have an incentive to coordinate the actions of firms that would otherwise be competing rivals, leading to anti-competitive pricing. This paper uses data on airline...