"The Routledge Handbook of Differentiation in the European Union offers an essential collection of ground-breaking chapters reflecting on the causes and consequences of this complex phenomenon. With contributions from key experts in this sub-field of European Studies, it will become a key volume used for those interested in learning the nuts and bolts of differentiation as a mechanism of (dis)integration in the European Union, especially in the light of Brexit. Organised around five key themes, it offers an authoritative 'encyclopaedia' of differentiation and addresses questions such as:

The notion of Differentiated Integration is increasingly used in the literature on European integration. Often employed interchangeably with the notion of "flexible integration, diverging views on its nature have led to the emergence of various definitions and, to some extent, a semantic confusion. A lack of consensus characterizes the academic literature; some authors even avoid putting an explicit definition on the term. The main objective of this book is to seek answers for the following questions: How can one define Differentiated Integration in the European Union? Should Differentiated Integration be considered as a process, a concept, a system or a theory? Should it be seen as a temporary or a well-established phenomenon? How is this field of study likely to develop in the future? In order to do so, all chapters, written by leading experts in the field, offer a state-of-the-art analysis of the study of differentiated integration, from theoretical and practical perspectives. In addition, this book is not a collection of isolated papers: all chapters are interconnected and gravitate towards the aforementioned central questions, but approach these from different perspectives. This book was published as a special issue of the Journal of European Public Policy.

Far from displaying a uniform pattern of integration, the European Union varies significantly across policy areas, institutional development and individual countries. Why do some policies such as the Single Market attract non-EU member states, while some member states choose to opt out of other EU policies? In answering these questions, this innovative new text provides a state-of-the-art introduction to the study of European integration. The authors introduce the most important theories of European integration and apply these to the trajectories of key EU policy areas – including the single market, monetary policy, foreign and security policy, and justice and home affairs. Arguing that no single theory offers a completely convincing explanation of integration and differentiation in the EU, the authors put forward a new analytical perspective for describing and explaining the institutions and policies of the EU and their development over time. Written by a team of prominent scholars in the field, this thought-provoking book provides a new synthesis of integration theory and an original way of thinking about what the EU is and how it works.

This book offers a comprehensive account and assessment of differentiation in European integration, including an analysis of differentiation in EU enlargement, the Eurozone crisis, Brexit, and the selective integration of non-member states.

Far from displaying a uniform pattern, European integration varies significantly across policy areas and individual countries. Why do some member states choose to opt out of specific EU policies? Why are some policies deeply integrated whereas others remain intergovernmental? In this updated second edition, the authors introduce the most important theoretical approaches to European integration and apply these to the trajectories of key EU policy areas. Arguing that no single theory offers a completely convincing explanation of integration and differentiation in the EU, this thought-provoking book provides a new synthesis of integration theory and an original way of thinking about what the EU is and how it works.

This book, adopting a law in context approach, deals with the controversial development of increased differentiation in European Union law.

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 than ever are marked by concentric circles of integration and a lack of uniform application. As the EU faces increasingly existential challenges, this timely book considers whether the proliferation of mechanisms of flexibility has contributed to this newly fragile state or whether, to the contrary, differentiation has been fundamental to integration despite the heterogeneity of national interests and priorities.

Assessing the consequences of Brexit on EU policies, institutions and members, this book discusses the significance of differentiation for the future of European integration. This book theoretically examines differentiated integration and disintegration, focuses on how this process affects key policy areas, norms and institutions of the EU, and analyses how the process of Brexit is perceived by and impacts on third countries as well as other organizations of regional integration in a comparative perspective. This edited book brings together both leading and emerging scholars to integrate the process of Brexit into a broader analysis of the evolution, establishment and impact of the EU as a system of differentiation. This book will be of key interest to scholar and students of European Union politics, European integration, Brexit, and more broadly to Public Administration, Law, Economics, Finance, Philosophy, History and International Relations.

Changing Borders in Europe focuses on the territorial dimension of the European Union. It examines the transformation of state sovereignty within the EU, the emergence of varied self-determination claims, and the existence of a tailor-made architecture of functional borders, established by multiple agreements. This book helps to understand how self-determination pressures within the EU are creating growing concerns about member states’ identity, redefining multi-level government in the European space. It addresses several questions regarding two transformative processes – blurring of EU borders and state sovereignty shifts - and their interrelations from different disciplinary perspectives such as political science, law, political economy and sociology. In addition, it explores how the variable geographies of European borders may affect the issue of national self-determination in Europe, opening spaces for potential accommodations that could be compatible with existing states and legal frameworks. This book will be of key interest for scholars, students and practitioners of EU politics, public administration, political theory, federalism and more broadly of European studies, international law, ethnic studies, political economy and the wider social sciences.

The Routledge Handbook of Differentiation in the European Union offers an essential collection of groundbreaking chapters reflecting on the causes and consequences of this complex phenomenon. With contributions from key experts in this subfield of European Studies, it will become a key volume used for those interested in learning the nuts and bolts of differentiation as a mechanism of (dis)integration in the European Union, especially in the light of Brexit. Organised around five key themes, it offers an authoritative "encyclopaedia" of differentiation and addresses questions such as: How can one define differentiation in the European Union in the light of the most recent events? Does differentiation create more challenges or opportunities for the European Union? Is Europe moving away from an "ever closer Union" and heading towards an "ever more differentiated Union", especially as leading political figures across Europe favour the use of differentiation to reconcile divergences between member states? This handbook is essential reading and an authoritative reference for scholars, students, researchers and practitioners involved in, and actively concerned about, research in the study of European integration. As European differentiation is multifaceted and involves a wide range of actors and policies, it will be of further interest to those working on countries and/or in policy areas where differentiation is an increasingly relevant feature. The Introduction and chapters 13, 21, 30, and 35 of this book is available for free in PDF format as Open Access from the individual product page at www.routledge.com. It has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.