This book investigates public-private partnerships, with special reference to the law of the European Union and the Member States. It deals in detail with what public-private partnerships are, whether and how they are regulated, and whether the concept carries meaning outside the regulatory framework. Based on detailed analysis, the author offers conclusions on how public-private partnerships should develop and be regulated in practice, and provides a solid basis, including a comprehensive review of the relevant literature, for further research. This book will be important to researchers and students in political law and regulation, as well as practitioners and policy makers. Although the examples studied are from the European Union, the conclusions will be applicable worldwide.