Most network industries throughout Europe are subject to sector-specific regulation with large impact on market structures and results. Consequently, questions related to regulatory designs and their effects on market outcomes become more and more important in business and politics as well as in scholarly research. Concentrating on Germany and the UK, Christian Wernick provides the reader with insights on the effects of different regulatory strategies, which take place under a common European regulatory framework. Combining theoretical analyses and empirical material a sophisticated and balanced picture on the coherences between regulation and investment behaviour in Germany’s and the UK’s broadband markets is presented.