The signature of the 1992 Maastricht Treaty was a major step in the development of the European Union (EU). It represented not only the key moment of the introduction of the single currency, but also the result of difficult negotiations during which important initial objectives fell by the...

The present manual offers to policymakers and practitioners a comprehensive and ready-to-use toolkit for the design, choice, and assessment of differentiated integration scheme. On the one hand, it distils the policy-relevant insights of academic research on differentiation and other forms of...