Methodology related to international migration

  • Local area migration indicators QMI

    Methodology | Released on 27 August 2020

    Quality and Methodology Information for local area migration, detailing the strengths and limitations of the data, methods used, and data uses and users.

    Keywords: local, migration, immigration, emigration

  • Long-Term International Migration estimates methodology

    Methodology | Released on 27 February 2020

    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.

    Keywords: IPS locations, migrant switchers, visitor switchers, assumptions, methodology changes

  • Long-Term International Migration estimates and their reliability and accuracy

    Methodology | Released on 27 February 2020

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

    Keywords: international migration, sampling distribution, sampling error, statistical significance, confidence intervals

  • Short-Term International Migration Estimates for England and Wales QMI

    Methodology | Released on 24 May 2019

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

    Keywords: migrants, immigration, emigration

  • Short-Term International Migration methodology – local authority estimates

    Methodology | Released on 24 May 2019

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

    Keywords: STIM, flows, local authority, migration, immigrants

  • Guidance note for revising official long-term non-EU student migration estimates, year ending September 2016

    Methodology | Released on 28 February 2019

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

    Keywords: revision, methodology, migration, students, IPS

  • International migration – terms, definitions and frequently asked questions

    Methodology | Released on 28 February 2019

    An introduction to the main concepts that underpin international migration statistics, including answers to frequently asked questions.

    Keywords: glossary, international definitions, illegal migrants, bulgarian, romanian, LTIM

  • International Passenger Survey: quality information in relation to migration flows

    Methodology | Released on 23 August 2018

    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.

    Keywords: airports, IPS, sampling

  • International migration statistics first time user guide

    Methodology | Released on 24 May 2018

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

    Keywords: what is migration, confidence intervals, who is a migrant, statistical significance, how reliable are migration estimates

  • Short-Term International Migration methodology – national estimates

    Methodology | Released on 24 May 2018

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

    Keywords: STIM, flows, stocks, emigrants, immigrants