Methodology - Migration and Asylum

Methodology: Asylum

EU Member States are obliged by the EU legislation in the field of asylum statistics to follow agreed concepts, definitions and breakdowns to ensure comparability in the asylum data they transmit to Eurostat.

Metadata & data collection guidelines

Asylum data are based on different Eurostat methodological and technical guidance for each of the data collection:

Asylum applications

Metadata file                      Data collection guidelines

Decisions on asylum applications

Metadata file                      Data collection guidelines

Dublin statistics

Metadata file                      Data collection guidelines

Statistical unit

The statistical unit for the asylum statistics is the person. This means that the data provided count the number of people covered by an administrative event, for example an asylum application or a Dublin request, and not the number of administrative events.

For statistics on asylum applications and decisions, a person must be counted only once during a given reference period. Therefore, the measurement unit in asylum statistics is the number of asylum applicants during a given reference period.

This is not the case for Dublin statistics, where each submitted or received request/decision/transfer concerning the same person during the same reference period must be reported - implying that one person can be reported more than once during a given reference period by the same Member State. The measurement unit for the Dublin statistics therefore corresponds to the number of requests/decisions/transfers at individual level.

More information

Article: Asylum statistics introduced

Data sources and compilation methods

The asylum data collections are based on administrative data sources only.

Data are compiled from the administrative records of the national authorities, mainly the interior ministries or Immigration Agencies to which asylum applicants lodge their application for international protection.

European aggregates

Based on the national detailed figures transmitted by the national data providers, Eurostat derives European aggregates by applying common calculation method: the geographical aggregation is done by arithmetical sum, when there are no missing values among the components of the respective geographical aggregate. Otherwise, they are not calculated.