The supply shock that hit the Nordic electricity market in 2002-2003 put the market to a severe test. A sharp reduction in inflow to hydro reservoirs during the normally wet months of late autumn pushed electricity prices to unprecedented levels. We take this event as the starting point for...

We consider a dynamic two-period model where two firms offer products that are differentiated a la Hotelling. Consumers purchase products in a first period, and in a second period consumers are locked-in to their first-period choice of producer with a switching cost. In the second period firms...

We formulate an analytic equilibrium model for simultaneously functioning electricity market and a market for Green Certificates. The major focus of the paper is the effect of market power in a Green Certificate system. One of the main results from the analysis is that the certificate system...

The paper studies the performance of joint ventures where upstream firms sell inputs to a production joint venture. It is found that joint ventures lead to overinvoicing of input prices (transfer prices) compared to integrated firms resulting in lower aggregate profits. Tax and tariff policy may...

Two producers delegate sales of differentiated products to common retailers, each with a monopoly position. Each producer can offer either a linear or a two-part tariff. In the single period game each producer's dominant strategy is to use a two-part tariff. If the two producers' products are...