Methodology related to international migration

In-depth look at methodology of both Long-Term International Migration (LTIM) and the International Passenger Survey (IPS), including preliminary adjustments, assumptions made for variables, and changes over time.

Understanding the reliability and accuracy of Long-Term International Migration estimates, including sampling distribution, sampling error, statistical significance and confidence intervals.

Estimates of Short-Term International Migration to and from the UK for England and Wales, by reason for migration, age, sex and citizenship.

An introduction to the main concepts that underpin Short-Term International Migration statistics for local authorities in England and Wales.

Guidance for users containing the methodology and reason for revising official long-term International Passenger Survey (IPS) estimates of non-EU study.

This background note provides an overview of the quality of the International Passenger Survey (IPS) for estimating international migration flows and has been updated following additional work carried out during 2017. This includes the implementation of electronic questionnaires on tablets to replace the current paper questionnaires, an out-of-hours pilot, and a comparison of how other countries measure long-term immigration.

An introduction to the main concepts that underpin international migration statistics.

An introduction to the main concepts that underpin Short-Term International Migration statistics for England and Wales.

Estimates of Short-Term International Migration to and from the UK for England and Wales, by reason for migration, age, sex and citizenship.

More details on the data sources used in the MSQR and their comparability, and the quality of the data for both flows and stocks.