We test for the existence of endogenous agglomeration forces, using structural econometric models. After showing generally how to establish the existence of agglomeration forces empirically, we undertake an industry study of the maritime industry in Norway. The results suggest that there are...

We study cartel contracts using data on 18 contract clauses of 109 legal Finnish manufacturing cartels. One third of the clauses relate to raising profits; the others deal with instability through incentive compatibility, cartel organization, or external threats. Cartels use three main...

The notion 'semicollusion' refers to situations where firms collude in one (or several) choice variable(s) and compete in others. For example, firms collude on prices and compete on advertising. Although the notion 'semicollusion' is not so often used explicitly, it turns out that the topic is...