Tools for collecting information on irregular migration estimates and indicators

Area of Science:

• Demography
• Migration Studies
• Public Policy

Background:

• Irregular migration data collection is challenging due to data scarcity and hard-to-reach populations.
• Previous projects like Clandestino (2000-2007) laid groundwork for irregular migration research.
• The MIrreM project builds upon prior work, extending the data collection period to 2008-2023.

Purpose of the Study:

• To develop and present tools for collecting quantitative data on irregular migration stocks and flows.
• To construct two databases critically appraising estimates and indicators of irregular migration.
• To support policymaking and research in countries with limited administrative data on irregular migration.

Main Methods:

• Development of specific tools for quantitative data collection on irregular migration.
• Creation of two databases: one for irregular migrant stocks and another for flows.
• Refinement of quality assessment criteria for estimates and statistical indicators, distinguishing between the two.

Main Results:

• Two comprehensive databases inventorying and appraising irregular migration estimates and indicators.
• Databases cover 12 EU member states, the UK, Canada, the USA, and five transit countries.
• Inclusion of data on irregular migrant population size, characteristics, changes, and related indicators (e.g., border apprehensions).

Conclusions:

• The MIrreM tools and databases provide a valuable resource for understanding irregular migration.
• The refined methodology enhances the quality assessment of migration data.
• These tools are applicable to researchers facing similar data challenges in migration studies.