The PhD studies different empirical methods to detect bid-rigging cartels. It shows first that simple statistical screens perform very well to detect bid-rigging infringement. Second, the econometric method of Bajari, well established in the literature, produces poor results.

We use both economic theory and experiments with Artificial Intelligence (AI) pricing agents to study the roles of consumer search friction on collusion and implications on market prices and consumer welfare. By developing an oligopoly model in which consumers sequentially search for the best...