The liberalisation of the electricity sector has changed the way in which electricity is traded. De facto or legal vertical monopolies are gradually abandoned and new participants have entered the market. At the wholesale level, one of the important developments is the establishment of organised electricity markets, i.e. electricity power exchanges. This book analyses the role and evaluates the impact of these new organised markets, which until now received little attention. The introduction provides an overview of the developments on EC level as this creates the legal environment within which power exchanges operate. The implementation of the EC Electricity Directive has inter alia resulted in a commodization of electricity trading. Thereupon the development of power pools and electricity exchanges is discussed as well as the products which can be traded. Subsequently, the development of the most important national and/or regional exchanges in Europe will be examined. National experts will analyse the role of power exchanges in the Nordic countries, the United Kingdom, the Netherlands, Germany, France, Austria, Spain and Italy. The authors analyse the most important developments in their jurisdictions according to a fixed outline (e.g. implementation of the EC Electricity Directive, market structure, emergence and functioning of the organised market, products traded and the impact of cross-border trade) which allows for a comparative analysis and facilitates understanding. Finally, some conclusions with regard to the establishment of a single electricity market will be presented as well as some future developments.