Eigentumsentflechtung,deep-ISO,der dritte Weg — wohin führt die Reise der Europäischen Energiemärkte?

This paper discusses vertical unbundling of networks from the commercial businesses in the European energy markets. The current status quo in the political field in Brussels is to implement a choice between three options: ownership unbundling, the “deep-ISO”, the “third way”. The “third way” is the strengthening of the current unbundling regulations, but will change hardly anything in the industry structure. The “deep-ISO” requires the separation of system operations into an independent entity, whereas transmission ownership does not change hands and thus possibly remains in one hand with the power plants. If the ISO decides and orders network investment, we speak of a “deep-ISO”. The more controversial proposal is ownership unbundling. A social-cost-benefit-analysis of the German transmission system operators (Brunekreeft, 2008) suggests that the likely overall effect for social welfare is slightly positive, but effects are small.