Labour productivity, UK: July to September 2014

Output per hour worked, per job and per worker for the whole economy and a range of industries, and changes in unit labour costs which is an indicator of inflationary pressures in the economy.

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This is an accredited national statistic.

Cyswllt:
Email Stuart Newman

Dyddiad y datganiad:
24 December 2014

Cyhoeddiad nesaf:
1 April 2015

1. Labour Productivity, Q3 2014

  • UK Labour Productivity as measured by output per hour increased by 0.6% in the third quarter of 2014 compared with the previous quarter and was 0.3% higher than a year earlier. However, productivity remains about 2% below its level prior to the economic downturn in 2008.
  • Output per hour increased in all of the main industrial groupings in the third quarter, by 0.5% in the production industries and 0.6% in the service industries.
  • Unit labour costs increased across the whole economy by 0.5% in the third quarter, reflecting a sharp increase in labour costs per hour worked.
  • This edition contains new estimates of regional productivity to 2013. These estimates show that productivity is above the UK average in London and the South East, and well below the UK average in Wales and Northern Ireland.
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2. About this release

This release reports labour productivity statistics for the third quarter of 2014 for the whole economy and a range of industries, together with selected data on unit labour costs. Labour productivity measures the amount of real (inflation-adjusted) economic output that is produced by a unit of labour input (in terms of workers, jobs and hours worked) and is a key indicator of economic performance. Since labour costs account for around two-thirds of the cost of production of UK economic output, unit labour costs provide an indication of inflationary pressures in the economy.

Output statistics in this release are consistent with the latest Quarterly National Accounts published on 23 December 2014. Labour input measures are consistent with the latest Labour Market Statistics as described further in the 'General commentary' and 'Notes on sources' sections below.

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3. Interpreting these statistics

Whole economy output (gross value added – GVA) increased by 0.8% in the third quarter of 2014, while the Labour Force Survey (LFS) shows that the number of workers, jobs and hours increased by 0.4%, 0.3% and 0.1% respectively over this period1. Since growth of labour productivity can be decomposed as growth of GVA minus growth of labour input, this combination of movements in output, workers, jobs and hours implies that UK labour productivity increased by 0.4% in terms of output per worker and output per job, and by 0.6% in terms of output per hour2.

Differences between growth of output per worker and output per job reflect changes in the ratio of jobs to workers. This ratio was unchanged in Q3. Differences between these measures and output per hour reflect movements in average hours which, though typically not large from quarter to quarter, can be material over a period of time. For example, a shift towards part-time employment will tend to reduce average hours. For this reason, output per hour is a more comprehensive indicator of labour productivity and is the main focus of the commentary in this release.

Unit labour costs (ULCs) reflect the full labour costs, including social security and employers’ pension contributions, incurred in the production of a unit of economic output, while unit wage costs (UWCs) are a narrower measure, excluding non-wage labour costs3. Growth rates of these series can be decomposed as growth of labour costs per unit of labour input minus growth of labour productivity. For example, with labour productivity increasing by 0.6% on an output per hour basis in the third quarter, the 0.5% increase in ULCs implies that labour costs per hour increased by 1.1% across the economy as a whole. In the manufacturing sector, the combination of output per hour growth of 0.6% and no change in unit wage costs implies an increase in manufacturing wage costs per hour of around 0.6% over the quarter.

Most of the series in this release are designated as National Statistics, meaning their production has been subject to rigorous quality assurance and methodological scrutiny. However, some service industry estimates use component series from the Index of Services (IOS) which are designated as experimental statistics (that is, not yet accredited as National Statistics, for example because the methodology is under development or reflecting concerns over data sources). Labour productivity estimates that use these series as their numerators are also labelled as experimental statistics. Market sector productivity estimates are also experimental series. More information on the experimental IOS series is available on the Guidance and methodology section of the ONS website.

Notes for interpreting these statistics

  1. The growth rate of GVA in Q3 differs slightly from the growth rate of GDP (0.7%). Growth rates for whole economy workers, jobs and hours shown in Table 10 may differ slightly from growth rates based on LFS aggregate estimates due to different methods of seasonal adjustment.
  2. Slight differences between published and implied growth rates of productivity are due to rounding.
  3. Both measures include labour costs of the self-employed.
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4. General commentary

Figure 1 shows cumulative contributions to growth of output per hour since 2008 by broad industry. The height of each bar reflects labour productivity movements in that industry and the industry weight, which in turn is a function of its weight in hours worked and output1. In Q3 2014, whole economy output per hour was 1.8% lower than in Q1 2008. This is approximately 16% lower than had productivity maintained its pre-downturn trend.

Figure 1 highlights the negative contribution to productivity of the ABDE industry aggregate and, to a lesser extent, Financial Services.

Notes for general commentary

  1. The decomposition is exact for periods over which the National Accounts have been balanced through the supply-use framework, that is to 2012. Small inconsistencies arise from Q1 2013 because the GVA weights are currently fixed for these periods.
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5. Whole economy labour productivity

Figure 2 shows whole economy output per worker in terms of index levels and percentage changes. Figure 3 shows whole economy output per hour, and Figure 4 provides a breakdown of the components of labour productivity over recent quarters. Figure 4 shows that hours worked have increased faster than jobs since 2011, implying that average hours per job have increased. This is consistent with the weaker path of output per hour compared with output per worker shown in Figures 2 and 3. More information is available in Reference Table LPROD01 (356.5 Kb Excel sheet) and in the tables at the end of the PDF version of this statistical bulletin.

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6. Unit labour costs

Figure 5 shows whole economy ULCs in terms of index levels and percentage changes on the previous quarter and on the previous year. In Q3, ULCs increased by 0.5% on the previous quarter but the year-on-year increase was more subdued (0.2%).

Manufacturing unit wage costs (Figure 6) were unchanged in Q3 compared with the previous quarter and 1.0% lower than a year earlier. As well as being a narrower measure than unit labour costs, the manufacturing unit wage cost series currently uses average weekly earnings in manufacturing (a measure of employee earnings) to proxy the earnings of self-employed workers in manufacturing, which is inconsistent with other ONS data on incomes of the self employed. Subject to this proviso, the robust increase in manufacturing output per hour in the year to Q3 (5.2%) implies that manufacturing wage costs per hour have also increased significantly, by around 4%.

ONS published proposals for replacing manufacturing UWCs with a broader and more consistently derived measure of manufacturing ULCs in an article 'Sectional unit labour costs' on 28 November 2012.

More information on unit labour costs and unit wage costs is available in Table 2 of Reference Table LPROD01 (356.5 Kb Excel sheet) , and in the tables at the end of the PDF version of this statistical bulletin.

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7. Manufacturing labour productivity

Figures 7 (output per job) and 8 (output per hour) show movements in labour productivity in manufacturing in terms of levels and percentage changes on the previous quarter and on the previous year. Manufacturing output per hour has increased in each of the latest four quarters and was 5.2% higher than a year earlier in Q3, the fastest rate of increase since 2010. Figure 9 provides information on the component movements in manufacturing output and labour inputs, showing that growth of labour inputs into manufacturing has been much more subdued than across the whole economy. In particular, hours worked in manufacturing have fallen in each of the latest two quarters, although the number of manufacturing jobs has increased.

Figure 10 shows the cumulative contributions to growth of manufacturing output per hour since 2008. This analysis highlights the large negative contribution to productivity of industries 20-21 (Chemicals and Pharmaceuticals), particularly since 2010. By contrast, industries 26-30 (Equipment industries) have made strongly positive contributions to productivity growth since 2010.

More information on labour productivity of sub-divisions of manufacturing is available in Reference Table LPROD01 (356.5 Kb Excel sheet) (Tables 3 and 4), and in the tables at the end of the PDF version of this statistical bulletin. Care should be taken in interpreting quarter on quarter movements in productivity estimates for individual sub-divisions, as small sample sizes of the source data can cause volatility.

Tables 3 and 4 include annual estimates for the level of productivity in £ terms for the National Accounts base year of 2011. These are estimates of GVA per unit of labour input and are not necessarily related to pay rates. Output per job (Table 3) varied from £39.3k in Wood and paper products (divisions 16-18) to £134.4k in Chemicals & Pharmaceuticals (divisions 20-21). The average for the whole of manufacturing was £57.5k and the average for the whole economy was £47.2k in 2011.

Chemicals & Pharmaceuticals was also top of the distribution for output per hour in 2011 (£75.2), with Wood, paper products, & printing (divisions 16-18) and Basic metals & metal products (divisions 24-25) at the bottom of the distribution. On this basis the average for manufacturing as a whole was £31.1 and the average for the whole economy was £30.0 per hour.

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8. Services labour productivity

Figures 11 (output per job) and 12 (output per hour) show movements in labour productivity in services in terms of index levels and percentage changes on the previous quarter and on the previous year. Figure 13 provides information on the component movements in services output and labour inputs. In contrast to manufacturing, labour inputs into the service industries have grown more or less in line with output since 2011, and productivity growth has accordingly been more muted.

Figure 14 shows the cumulative contributions to growth of services output per hour since the economic downturn. From the beginning of 2008 to the third quarter of 2014, industries O-Q (Government services) and industry K (Financial and insurance activities) have made the largest negative contributions to services output per hour. In the case of O-Q the negative contribution mainly reflects hours rising faster than output, particularly over the period 2008-11. In the case of K, the negative contribution mainly reflects falling output over the whole period since 2008, not matched by falls in hours worked.

Industry L (Real estate activities) has made the largest positive contribution to services output per hour since 2008. This mainly reflects growth of imputed value-added from owner-occupied housing, for which there is no corresponding labour input.

More information on labour productivity of services industries is available in Tables 5 and 6 in Reference Table LPROD01 (356.5 Kb Excel sheet) and in the tables at the end of the PDF version of this statistical bulletin.

In general, the dispersion of labour productivity growth rates across service industries is less pronounced than within manufacturing. At face value, the dispersion of productivity levels is more pronounced. However, it should be borne in mind that labour productivity in industry L is affected by the National Accounts concept of output from owner-occupied housing, which adds to the numerator but without a corresponding component in the denominator. Excluding this industry, output per job in 2011 varied from £21.6k in Accommodation & food services (section I) to £106.2k in Finance & insurance (section K). These industries were also at the bottom and top of the productivity distribution in terms of output per hour (Table 6).

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9. Market sector (experimental statistics) labour productivity

Figure 15 shows movements in output per hour in the market sector with the whole economy series from Figure 3 plotted for comparison purposes. Market sector productivity fell more steeply than whole economy productivity during 2011 and 2012. However, between Q4 2012 and Q3 2014, market sector output per hour increased by 1.6% compared with an increase of 0.8% for the whole economy measure.

Longer time series on market sector labour productivity are available in Table 7 of Reference Table LPROD01 (356.5 Kb Excel sheet) and in the tables at the end of the PDF version of this statistical bulletin.

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10. Regional labour productivity

This section uses regional estimates of nominal GVA (NGVA) up to 2013, consistent with the ONS regional GVA release on 10 December 2014. The estimates in Table 9 of Reference Table LPROD01 (356.5 Kb Excel sheet) and in the tables at the end of the PDF version of this statistical bulletin indicate the relative value of economic output per job and per hour across the NUTS1 regions, indexed to the UK=100. In interpreting these statistics it should be borne in mind that they do not take account of price differences across regions (e.g. in housing costs) and should not therefore be interpreted as measures of relative living standards.

NGVA data have been revised up in all regions and in all time periods, reflecting an extensive program of changes to the National Accounts implemented with Blue Book 2014. These changes in turn reflect the adoption of a new accounting standard (ESA10) in addition to the normal Blue Book processes of balancing, benchmarking to administrative data, updating of weights etc. ONS has published a number of articles describing these changes, available here. Although regional GVA estimates have increased for all regions, the rate of increase is not uniform. London saw the smallest increases in GVA over the revision period, while some regions, such as Northern Ireland, display proportionately larger upward revisions to NGVA compared to data prior to Blue Book 2014.

Regional jobs and hours estimates have also been revised from 2001 to reflect updated LFS weights arising from the 2011 Census. The impact of these revisions is fairly uniform across the regions.

Figure 16 shows that, of the NUTS1 regions, only in London and the South East is NGVA per job above the UK average, although this is sufficient for England as a whole to be fractionally above average. NGVA per job was close to the UK average in 2013 in the East of England and in Scotland. In all other regions, NGVA per job was at least 10% lower than the UK average in 2013.

A broadly similar pattern obtains for NGVA per hour (Figure 17), although the margin by which London exceeds the UK average is significantly smaller, and Wales and Northern Ireland exchange places at the bottom of the productivity distribution. Differences between Figures 16 and 17 reflect differences in average hours worked across the regions. In 2013, average hours worked were highest in London and lowest in the South West.

Regional productivity differentials have been fairly stable over time, although there is some faint evidence that London's productivity advantage is narrowing a little, and that productivity in Scotland is closing in on the UK average.

On 18 December 2014 ONS published experimental statistics on real (inflation adjusted) GVA by region, constrained to UK totals for the years 1998-2012. For 2012, the distribution of productivity shown in Table 9 would generally be very similar using these real GVA estimates as the numerators rather than NGVA.

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11 .Revisions

Table R1 in Reference Table LPROD01 (356.5 Kb Excel sheet) (and in the tables at the end of the PDF version of this statistical bulletin) shows revisions to growth rates of the main productivity variables for the whole economy and selected sub-industries between this release and the previous release on 1 October 2014. On the output side, GVA estimates have been revised back to Q1 2013 and are proportionately larger for manufacturing and production than for services.

On the input side, hours and jobs estimates have been revised at the industry level due to the impact of re-weighting Labour Force Survey (LFS) estimates arising from the 2011 Census, as described in this article. In addition, new LFS benchmark estimates are available from Q1 2014, and there have been a few small changes to historic LFS benchmarks due to the seasonal adjustment process.

A research note on sources of revisions (145.4 Kb Pdf) to labour productivity estimates is available on the ONS website.

Table A below summarises differences between first published estimates for each of the statistics in the first column with the estimates for the same statistics published three years later. This summary is based on five years of data, that is, for first estimates of quarters between Q4 2006 and Q3 2011, which is the last quarter for which a three-year revision history is available. The averages of these differences with and without regard to sign are shown in the right hand columns of the table, and these can be compared with the value of the estimates in the latest quarter, shown in the second column. Additional information on revisions to these and other statistics published in this release is available in the Revisions triangles (1.18 Mb Excel sheet) component of this release.

This revisions analysis shows that whole economy labour productivity growth estimates have tended to be revised down over time, by 0.1-0.2 percentage points (on a year-on-year basis), while unit labour cost growth estimates have tended to be revised up by 0.2-0.4 percentage points. Absolute revisions have been larger for unit labour costs than for productivity. Were the average revisions to apply to the current release, growth of output per hour in the year to the third quarter of 2014 would be revised down from 0.3% to 0.1% over the next three years, and growth of unit labour costs would be revised up from 0.2% to 0.6% over the same period.

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12 .Notes on sources

The measure of output used in these statistics is the chain volume (real) measure of Gross Value Added (GVA) at basic prices, with the exception of the regional analysis in Table 9, where the output measure is nominal GVA (NGVA). These measures differ because NGVA is not adjusted to account for price changes; this means that if prices were to rise more quickly in one region than the others, then this would be reflected in apparent improved measured productivity performance in that region relative to the others. At the whole economy level, real GVA is balanced to other estimates of economic activity, primarily from the expenditure approach. Below the whole economy level, real GVA is generally estimated by deflating measures of turnover; these estimates are not balanced through the supply-use framework and the deflation method is likely to produce biased estimates. This should be borne in mind in interpreting labour productivity estimates below the whole economy level.

Labour input measures used in this bulletin are known as 'productivity jobs' and 'productivity hours'. Productivity jobs differ from the workforce jobs (WFJ) estimates published in Table 6 of the ONS Labour Market Statistics Bulletin, in three ways:

  • To achieve consistency with the measurement of GVA, the employee component of productivity jobs is derived on a reporting unit (RU) basis, whereas the employee component of the WFJ estimates is on a local unit (LU) basis. This is explained further below.

  • Productivity jobs are scaled so industries sum to total LFS jobs. Note that this constraint is applied in non-seasonally adjusted terms. The nature of the seasonal adjustment process means that the sum of seasonally adjusted productivity jobs and hours by industry can differ slightly from the seasonally adjusted LFS totals.

  • Productivity jobs are calendar quarter average estimates whereas WFJ estimates are provided for the last month of each quarter.

Productivity hours are derived by multiplying employee and self-employed jobs at an industry level (before seasonal adjustment) by average actual hours worked from the LFS at an industry level. Results are scaled so industries sum to total unadjusted LFS hours, and then seasonally adjusted.

Industry estimates of average hours derived in this process differ from published estimates (found in Table HOUR03 in the Labour Market Statistics release) as the HOUR03 estimates are calculated by allocating all hours worked to the industry of main employment, whereas the productivity hours system takes account of hours worked in first and second jobs by industry.

Whole economy unit labour costs are calculated as the ratio of total labour costs (that is, the product of labour input and costs per unit of labour) to GVA. Further detail on the methodology can be found in Revised methodology for unit wage costs and unit labour costs: explanation and impact.

Manufacturing unit wage costs are calculated as the ratio of manufacturing average weekly earnings (AWE) to manufacturing output per filled job. On 28 November 2012 ONS published Productivity Measures: Sectional Unit Labour Costs describing new measures of unit labour costs below the whole economy level, and proposing to replace the currently published series for manufacturing unit wage costs with a broader and more consistent measure of unit labour costs.

What is a reporting unit?

The term 'enterprise' is used by ONS to describe the structure of a company. Individual workplaces are known as 'local units' and a group of local units under common ownership is called the 'enterprise'. Reporting units are the parts of enterprises that return data to ONS. While the majority of reporting units and enterprises are the same, larger enterprises have been split into reporting units to make the reporting easier.

For most business surveys run by ONS, forms are sent to the reporting unit rather than local units, in other words, to the head office rather than individual workplaces. This enables ONS to gather information on a greater proportion of total business activity than would be possible by sending forms to a selection of local units. But it has the disadvantage that it is difficult to make regional estimates – for instance all the employment of, say, a chain of shops would be reported as being concentrated at the site of the head office.

Further differences between reporting unit and local unit data can be seen in the industry coding. Take, for example, a reporting unit with three cake shops and one bakery, each employing five people. The local unit analysis would put 15 employees in the retail industry and five employees in the manufacturing industry. But the reporting unit series puts all 20 people into the industry with the majority activity, in this case, retailing. Detailed industry figures compiled using the local unit approach will therefore be different from industry figures using the reporting unit approach, although the totals will be the same at the whole economy level.

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13 .Background notes

  1. This statistical bulletin

    This statistical bulletin presents Labour Productivity estimates for the UK. More detail can be found on the Productivity Measures Topic page on the ONS website.

    Index numbers are referenced to 2011=100, are classified to the 2007 revision to the Standard Industrial Classification (SIC) and are seasonally adjusted.

    Quarter on previous quarter changes in output per job and output per hour worked for some of the manufacturing sub-divisions and services sections should be interpreted with caution as the small sample sizes used can cause volatility.

  2. Quality and Methodology

    A revised and updated Quality and Methodology Information paper for Labour Productivity was published in March 2012. This paper describes the intended uses of the statistics presented in this publication, their quality and methods used to produce them. It also includes more information on the uses and limitations of labour productivity estimates.

  3. Future developments

    ONS has recently developed new and improved measures of labour input as part of ongoing work to comply with EU regulations. Specifically, these new measures provide an industry breakdown of employment (i.e. on a headcount basis rather than a job basis), and provide a split between employees and the self-employed. For methodological consistency, this work has also made some changes to the computation of corresponding hours series. These series are currently available on the Eurostat website and ONS has published an article entitled Introducing New Labour Productivity Statistics which describes these new series.

    In response to user requests, ONS has now published selected estimates of labour productivity using the new and improved estimates of labour inputs, together with comparisons against the corresponding estimates from the existing productivity system. These are available as an additional reference table component (table NEWLPROD01) of the already published article Introducing New Labour Productivity Statistics.

  4. Other data on productivity

    ONS has published Labour Productivity Measures from the ABS, 2008-2012. This article uses published estimates from the Annual Business Survey (ABS) to provided more detailed information on recent trends in labour productivity by industry than those available from other sources.

    ONS publishes International comparisons of labour productivity in levels and growth rates for the G7 countries.

    More international data on productivity are available from the OECD, Eurostat, and the Conference Board.

    ONS publishes experimental estimates of Multi-factor productivity (MFP), which decompose output growth into the contributions that can be accounted for by labour and capital inputs. In these estimates, the contribution of labour is further decomposed into quantity (hours worked) and quality dimensions.

    ONS also publishes experimental indices of labour costs per hour. These differ from the concept of labour costs used in the unit labour cost estimates in this release. The main difference is that experimental indices of labour costs per hour relate to employees only, whereas unit labour costs also include the labour remuneration of the self-employed.

    Lastly, ONS publishes a range of Public sector productivity measures and related articles. These measures define productivity differently from that used in the ONS labour productivity and MFP estimates. Further information can be found in Phelps (2010) (252.5 Kb Pdf).

    More information on the range of ONS productivity estimates can be found in the ONS Productivity Handbook.

  5. User engagement

    ONS is hosting a half-day workshop for users of productivity statistics, to be held in London on 4 February 2015. Notes from the 2014 workshop are available here. If you are interested in attending future workshops or if you have any comments on this release please email Productivity@ons.gov.uk.

    You can follow ONS on Twitter: www.twitter.com/ons and Facebook: www.facebook.com/statisticsons.

  6. Publication policy

    Details of the policy governing the release of new data are available from the UK Statistics Authority or from the Media Relations Office email: media.relations@ons.gov.uk. A list of the names of those given pre-publication access to the contents of this bulletin is also available.

  7. Details of the policy governing the release of new data are available by visiting www.statisticsauthority.gov.uk/assessment/code-of-practice/index.html or from the Media Relations Office email: media.relations@ons.gov.uk

    These National Statistics are produced to high professional standards and released according to the arrangements approved by the UK Statistics Authority.

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14 . Methodology

Manylion cyswllt ar gyfer y Bwletin ystadegol

Stuart Newman
productivity@ons.gov.uk
Ffôn: +44 (0)1633 651824