1. Main points and information

This article contains charts that compare the Labour Force Survey (LFS) single month estimates with their equivalent three-month average rates for employment, unemployment and economic inactivity. The single month estimates are derived from the same data source as the headline three-month figures but are not designated as National Statistics and their use is restricted to helping to understand the movements in the headline three-month averages. For the three-month averages, the dates shown on the charts relate to the last month of the three (for example, April to June is indicated by June).

Model-based single month estimates are now also produced and included within the data table attached to this article. The model uses single month wave-specific time series estimates for each variable, along with estimated variances, to produce modelled seasonally adjusted time series. These are currently experimental statistics.

Main points

  • The single month estimate for the employment rate in the UK, for May 2019, shows a decrease of 0.2 percentage points compared with the previous month.

  • The single month estimate for the unemployment rate in the UK, for May 2019, shows a decrease of 0.3 percentage points compared with the previous month.

  • The single month estimate for the economic inactivity rate in the UK, for May 2019, shows an increase of 0.4 percentage points compared with the previous month.

Summary of Labour Force Survey single month estimates

The single month estimate of the employment rate, for people aged 16 to 64 years in the UK, for May 2019 was 76.2%, a decrease of 0.2 percentage points compared with the previous month (April 2019) and a decrease of 0.2 percentage points compared with three months ago (February 2019). This compares with a headline estimate of 76.0% for the three months March to May 2019, a decrease of 0.1 percentage points compared with December 2018 to February 2019.

The single month estimate for the unemployment rate, for people aged 16 years and over in the UK, for May 2019 was 3.7%, a decrease of 0.3 percentage points compared with the previous month (April 2019) and a decrease of 0.1 percentage points compared with three months ago (February 2019). This compares with a headline estimate of 3.8% for the three months March to May 2019, which decreased by 0.1 percentage points compared with December 2018 to February 2019.

The single month estimate for the economic inactivity rate, for people aged 16 to 64 years in the UK, for May 2019 was 20.7%, an increase of 0.4 percentage points compared with the previous month (April 2019) and an increase of 0.3 percentage points compared with three months ago (February 2019). This compares with a headline estimate of 20.9% for the three months March to May 2019, which increased by 0.2 percentage points compared with December 2018 to February 2019.

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2. Things you need to know about this release

In June 2019 we released additional new experimental versions of the single month estimates alongside the current estimates; the new estimates are based on time series models using single month wave-specific time series estimates.

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3. Quality and methodology

The Labour Force Survey (LFS) single month estimates provide additional information about the latest quarterly movements in the headline three-monthly aggregates of employment, unemployment and economic inactivity. The production and evaluation of the estimates is an important part of our quality assurance of the three-monthly averages published in the Labour market overview.

Single month estimates are based upon one-third of the sample of the three-monthly series – approximately 15,000 households – consequently, sampling variability of the changes in the single month estimates is higher in relative terms than those of the headline aggregates and so any interpretation of them can only be in fairly broad terms.

The LFS sample is designed so that the data collected for any three consecutive monthly reference periods (or rolling quarters) are representative of the UK population, however, the data for any given single month are unlikely to be representative of the UK. These sampling effects can cause movements in the single month that are a consequence of the survey nature of the LFS and are not a true reflection of change in the wider economy. The movement in the latest single month figures is, in theory, a better indication of the latest change in the labour market than the difference between the latest two overlapping three-month periods, but it must still be treated with caution.

The sample design of the LFS often produces clear patterns in the single month series, which can aid interpretation of the LFS aggregates. The estimates help users determine the extent to which the movements in the headline aggregates are true reflections of changes in the UK labour market and the extent to which they reflect the survey nature of the LFS, in particular sampling variability. For example, 80% of the households surveyed in one month will also have been surveyed three months ago; this means the comparison between the latest month and three months ago usually provides a better indicator of the latest underlying change than the comparison with the previous month, for which there is no sample overlap.

The single month estimates are regarded as an “official statistic” and are not considered National Statistics because they do not have sufficient methodological robustness.

A methodological article explaining the background to the Labour Force Survey (LFS) single month estimates and describing how they are calculated is available.

The model-based single month Labour Force Survey estimates are derived from a state-space model and aim to improve upon the current experimental single month estimates. The model uses single month wave-specific time series estimates for each variable, along with estimated variances, to produce modelled seasonally adjusted time series. These new model-based estimates are considered to be Experimental Statistics.

A methodological article giving more detail regarding the new series is available.

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4. Other quality information

Quality and Methodology Information reports for the Labour Force Survey are available:

Further information about the Labour Force Survey (LFS) is available from the Labour Force Survey – user guide.

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Manylion cyswllt ar gyfer y Erthygl

Bob Watson
labour.market@ons.gov.uk
Ffôn: +44 (0)1633 455070