Project

Horizon Europe Measuring Irregular Migration and Related Policies Project (MIrreM)

MIrreM examines estimates and statistical indicators on the irregular migrant population in Europe, including the regularisation of migrants.

Date Published
21 Apr 2026
Project Type
Research
Project Status
Active
Project Website
https://irregularmigration.eu/
Authors
Dr. Lalaine Siruno Prof. Dr. Arjen Leerkes

Funded by: European Union, with additional support from UK Research and Innovation (UKRI) and the Government of Canada (Canada Excellence Research Chairs Program)

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.

UNU-MERIT/Maastricht University is leading work package 4 on Irregular Migration Flows. Lalaine and Arjen also serve as the national rapporteurs for the Netherlands, contributing to all other work packages.
 

Related content

Conference

UNU-MERIT Internal Conference 2026

UNU-MERIT’s Internal Conference is an annual event where researchers and fellows share work, exchange feedback, and strengthen collaboration.

-

Project

E-learning Course on Human Mobility in the Context of Climate Change

Building capacity in students, policymakers and practitioners through an interactive course on human mobility in the context of climate change

06 May 2026

Seminar

Migration Seminar Series: Beyond attracting talent: what makes skilled migrants stay?

Dr. Julia Reinold on skilled migrant retention, onward migration, and the factors shaping long-term settlement.

-