The introduction by the Amsterdam Treaty of the flexibility clauses, authorising a majority of Member States to cooperate more closely in areas covered by the T

Differentiation was at first not perceived as a threat to the European project, but rather as a tool to promote further integration. Today, more EU policies tha

Assessing the consequences of Brexit on EU policies, institutions and members, this book discusses the significance of differentiation for the future of Europea

The role of law in responding to global environmental problems and the interplay between different levels of regulation and governance is becoming increasingly

The book explores the hybrid nature of enhanced cooperation law between the law of single Member States and secondary EU law. Furthermore, it identifies the lim