The thesis at hand includes three distinct essays that analyze economic issues related to liberalized electricity markets. In the first essay, the effects of capacity mechanisms on the market structure in electricity markets are investigated. We consider a model with dominant firms and a...

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.