MIrreM examines estimates and statistical indicators on the irregular migrant population in Europe as well as related policies, including the regularisation of migrants in irregular situations. A core aim of the project is to address the uncertainty and contested nature of evidence on irregular migration by fostering a shared understanding of basic features of and policy options to address the phenomenon. MIrreM analyses policies defining migrant irregularity, stakeholders’ data needs and usage, and assesses existing estimates and statistical indicators on irregular migration in the countries under study and at the EU level. Using several coordinated pilots, the project develops new and innovative methods for measuring irregular migration and explores if and how these instruments can be applied in other socio-economic or institutional contexts. Based on a broad mapping of regularisation practices in the EU as well as detailed case studies, MIrreM will develop ‘regularisation scenarios’ to better understand conditions under which regularisation should be considered as a policy option. Together with expert groups that will be set up on irregular migration data and regularisation, respectively, the project will synthesise findings into a Handbook on data on irregular migration and a Handbook on pathways out of irregularity. The project’s research covers 20 countries, including 12 EU countries and the United Kingdom, involving stakeholders in the research. A core mandate of the project consists of engaging relevant stakeholders, including NGOs, service providers, migrant-led organisations, researchers and policymakers on local, national and EU levels in the research, in order to better take into account their needs and feed results from the project back into their work.


Duration 01/10/2022 - 30/09/2025
Funding EU
Logo - European Union

Department for Migration and Globalisation

Center for Migration and Globalisation Research

Principle investigator for the project (University for Continuing Education Krems) Ass.-Prof. Mag. Dr. Albert Kraler
Project members
Project website


Rössl, L., Schütze, T., Kraler, A. (2023). Austria. In: Hendow, M; Qaisrani, A; Brunovska, Compilation of 15 Country Briefs on Irregular Migration Policy Context: 10-24, University for Continuing Education Krems, Krems

Kraler, A. (2023). Taxonomy of migrant irregularity. MIrreM, Krems

Kraler, A.; Ahrens, J. (2023). Conceptualising migrant irregularity for measurement purposes. MIrreM Working Paper Nr.2, Krems


Insights from MIrreM

Roundtable - Bridging Research and Policy. Horizon 2020 and Horizon Europe Shaping Migration Policy, 14/12/2023

Concepts and estimates of irregular migration

New perspectives on irregular migration. Joint webinar of Horizon projects on irregular migration., 18/10/2023

Das MIRREM-Projekt & vorläufige Projektergebnisse

MIrreM Data Workshop. "Unsichtbar weil irregulär?” : Indikatoren und Schätzungen der irregulären Migrantenbevölkerung in Österreich, 20/09/2023

Tabuthema Irreguläre Migration: Antworten jenseits von Rückführung und Abschottung

Podiumsdiskussion, Österr. Akademie d. Wissenschaften, 20/09/2023

Measuring irregular migration and related policies

Irregular Migration in Europe: Data Challenges and Priorities for Informed Decision-Making. MIrreM Stakeholder Workshop, 12/09/2023

The use of data on irregular migration in policy making

ECPR General Conference, 05/09/2023

“Enhancing EU migration governance”? Reflections on the research-policy nexus in the context of Horizon Europe-funded research on irregular migration. Roundtable

20th Annual IMISCOE Conference, 05/07/2023

Irreguläre Migration: Politische und praktische Herausforderungen, Maßnahmen & Auswirkungen

MIrreM Policy Workshop, 12/06/2023

Irreguläre Migration und politische Antworten auf Irregularität

Wege in die Legalität, 02/06/2023

Daten zu irregulärer Migration in Österreich: Bedarf, Nutzung und Herausforderungen

MIrreM Stakeholder Workshop, 23/05/2023

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