Handbooks: Key insights on irregular migration data and on regularisation policies

The Handbook on Irregular Migration Data – Concepts, Methods and Practices brings together concepts, findings, methods, and case studies to offer a clear, practical understanding of irregular migration data. It addresses the challenges of conceptualising, measuring, interrogating, and using data on one of Europe’s most politically sensitive migration issues. Drawing on examples from across Europe and beyond, it provides guidance on concepts and definitions, ethics, estimation methods, data innovation, and policy application. It is designed to support policymakers, practitioners and researchers seeking more informed, transparent, and coordinated approaches to irregular migration data. 

The Handbook on Regularisation Policies – Practices, Debates and Outcomes demonstrates that migrant regularisation is not an exceptional measure but a core policy tool of migration governance. It examines policy designs, actors, and implementation challenges, highlighting impacts on labour markets, rights and social cohesion. Drawing on evidence from Europe and other world regions, it equips policymakers with practical options to address the presence of irregular migrants effectively and sustainably.