MIrreM Handbooks

Check out our Handbooks for 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.

To cite: Denis Kierans & Albert Kraler (eds.). Handbook on Irregular Migration Data. Concepts, Methods and Practices.

Krems: University of Krems Press, 2025.

ISBN: 978-3-903470-24-8

DOI: https://doi.org/10.48341/g31s-vq79

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. 

To cite: Jill Ahrens, Albert Kraler, Imanol Legarda Díaz-Aguado & Michele LeVoy (eds.). Handbook on Regularisation Policies: Practices, Debates and Outcomes

Krems: University of Krems Press, 2025.

ISBN: 978-3-903470-25-5

DOI: https://doi.org/10.48341/chqk-ey86

The Executive Summaries of MIrreM Handbook on Regularisation Policies – Practices, Debates and Outcomes, translated into five languages, are now available. They can be viewed and downloaded here:

EN
DE
ES
IT
FR

Measuring how many irregular migrants live in a country is no easy task. In this animation, we set out ways in which we can estimate the size of this population for evidence-based policy-making.

A person can become undocumented in various ways. In this animation, we explore some of them.

Regularisation is not an exceptional measure but a core policy tool of migration governance. In this animation, we show how it benefits the whole society.

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