Producentöverskottet ex ante, ex post

Sammanfattning: The purpose of this thesis is to examine whether or not the producer surplus calculated in Swedish cost benefit analyses correlate with the actual outcome in a satisfying way. In order to do this the electrification of Blekinge coastal railway in southern Sweden is examined by looking at the two parts of the producer surplus, the income generated by, and the cost of producing the service. While the producer surplus is examined a more in-depth examination of the functions used to calculate the costs of running the trains will take place in order to gain a better grasp of the accuracy of those functions. The thesis ends with conclusions on how well the cost benefit analyses calculate producer surplus and with recommendations on how the method could be improved in order to do it better in the future.