The promotion of competition in Europe's network industries has been in the foreground of economic policy in recent years. Network industries have undergone dramatic changes, involving privatisation, liberalisation and de- as well as re-regulation. But there are still many unresolved problems in both economic policy as well as economic research. Hence, a vivid exchange between academics and policy makers has emerged to find the optimal framework for these industries. This volume contributes to this discussion, containing several papers on various network industries.