Labour productivity, UK: October to December 2018

Output per hour, output per job and output per worker for the whole economy and a range of industries. Includes estimates of unit labour costs.

This is the latest release. View previous releases

5 April 2019

Informed by quality assurance prior to publication we would like to draw users’ attention to this note, which provides further information on the particularly large impact of revisions between Quarter 4 (Oct to Dec) 1997 and Quarter 1 (Jan to Mar) 1998, on industry K, which covers the financial and insurance industries.

This is an accredited national statistic.

Cyswllt:
Email Marianthi Dunn

Dyddiad y datganiad:
5 April 2019

Cyhoeddiad nesaf:
5 July 2019

1. Main points

  • Labour productivity for Quarter 4 (Oct to Dec) 2018, as measured by output per hour, decreased by 0.1% compared with the same quarter a year ago; this is the second successive quarterly fall following the decrease of 0.2% seen for the previous quarter (Quarter 3 (July to Sept) 2018).

  • Whilst services experienced labour productivity growth of 0.4%, manufacturing decreased by 1.1%.

  • Compared with the previous quarter, UK labour productivity is estimated to have grown by 0.3% in Quarter 4 (Oct to Dec) 2018; the increase in productivity reflected a slight decrease in the number of actual hours worked, whilst there was a larger increase in output growth for the quarter.

  • Productivity hours worked increased by 1.5% in Quarter 4 (Oct to Dec) 2018 compared with the same quarter a year ago, while the number of jobs increased by 1.3% over the same period.

  • In 2018, labour productivity measured as output per hour grew by 0.5% compared with the previous year, with increases in both services and manufacturing of 0.8% and 0.3% respectively.

  • Output per job increased by 0.3% in 2018 compared with the previous year. Services grew by 0.6% over the year whilst, in contrast, manufacturing fell by 0.7%.

  • Earnings and other labour costs outpaced productivity growth, resulting in unit labour cost growth of 3.1% in the year to 4 (Oct to Dec) 2018, compared with growth of 2.9% in the previous quarter.

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2. Things you need to know about this release

This release reports labour productivity estimates for Quarter 4 (Oct to Dec) 2018 for the whole economy, the UK regions at NUTS1 level and a range of industries, together with estimates of unit labour costs. Productivity is important as it is considered to be a driver of long-run changes in average living standards.

This edition forms part of our quarterly productivity bulletin, which also includes an overarching commentary, quarterly estimates of public service productivity and quarterly estimates of multi-factor productivity.

Labour productivity is calculated by dividing output by labour input. Output refers to gross value added (GVA), which is an estimate of the volume of goods and services produced by an industry, and in aggregate for the UK as a whole. Labour inputs in this release are measured in terms of workers, jobs (“productivity jobs”) and hours worked (“productivity hours”).

This release also reports estimates of unit labour costs (ULCs), which capture the full labour costs – including social security and employers’ pension contributions – incurred in the production of a unit of economic output. Labour costs make up around two-thirds of the overall cost of production of UK economic output. Changes in labour costs are therefore a large factor in overall changes in the cost of production. If increases in labour costs are not reflected in the volume of output, this can put upward pressure on the prices of goods and services, therefore this is a closely watched indicator of inflationary pressure in the economy.

Following the recent productivity user forum, we are exploring streamlining this release into three separate publications focusing on labour productivity, unit labour costs and regional accounts. We would be interested in users’ views on whether this may be positive, please send us your comments by email to productivity@ons.gov.uk.

The equations for labour productivity and ULCs can be found in the Quality and methodology section of this release.

The output statistics in this release are consistent with the latest Quarterly national accounts published on 29 March 2019. Note that productivity in this release does not refer to gross domestic product (GDP) per person, which is a measure that includes people who are not in employment. Regional productivity figures presented in this release use the unbalanced income measure of current price gross value added and are consistent with the Regional GVA NUTS1 published on 10 December 2018.

The labour input measures used in this release are consistent with the latest labour market statistics, as described further in the Quality and methodology section of this bulletin.

Unless otherwise stated all figures are seasonally adjusted.

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3. Labour productivity falls for the second consecutive quarter compared with the same quarter in the previous year.

Compared with the same quarter a year ago, labour productivity, on an output per hour basis, fell by 0.1% and has decreased for a second consecutive quarter.

A 0.1% decline compared with the same quarter in the previous year represents a continuation of the UK's “productivity puzzle”, with productivity since the economic downturn in 2008 growing more slowly than during the long period prior to downturn. This sustained stagnation contrasts with patterns following previous UK economic downturns, when productivity initially fell, but subsequently recovered to the previous trend rate of growth.

There is wide and varied economic debate regarding the causes of this puzzle and further analysis of recent UK productivity trends can be found in the January 2016, May 2016 and June 2016 Economic Reviews, as well as in several standalone articles including:

This puzzle is shown in Figure 1, which presents two alternative measures of productivity – output per hour and output per worker – alongside their projected 1994 to 2007 trends. Following years of steady growth, each measure peaked prior to and fell during the economic downturn. However, due to a strong labour market performance accompanying a relatively weak recovery in output growth, productivity has not returned to its pre-downturn trend. Productivity in Quarter 4 (Oct to Dec) 2018, as measured by output per hour, was 18.3% below its pre-downturn trend – or, equivalently, productivity would have been 22.5% higher had it followed this pre-downturn trend1.

Labour productivity increased by 0.3% in Quarter 4 2018 compared with the previous quarter. This increase left productivity 2.0% above its pre-downturn peak in Quarter 4 2007, although productivity has been consistently above its pre-downturn peak since Quarter 3 (July to Sept) 2016.

Figure 2 breaks down the growth in productivity between Quarter 1 (Jan to Mar) 2008 and Quarter 4 2018 into contributions from different industry groupings and an “allocation effect” due to movements in the share of output, labour or relative prices between each grouping. For example, a movement of labour from lower productivity industries to higher productivity industries will tend to increase aggregate productivity growth, even if both industries have static productivity in the same period.

Non-financial services were the main positive contributor to productivity growth over this period, partly offset by negative contributions from non-manufacturing production and finance. The negative allocation effect – suggesting that nominal output and labour have been moving away from higher to lower productivity industries in recent years – includes the falling share of output in mining and quarrying, which has among the highest levels of productivity of UK industry. This is partially a result of the falling reserves of oil and gas in the North Sea. Although negative for the period as a whole, the allocation effect was initially positive following the downturn, but turned negative in recent years.

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4. Output per hour increased in services and decreased in manufacturing, compared with a year ago

Services output per hour, compared with the same period a year ago, increased by 0.4% in the latest quarter (Quarter 4 (Oct to Dec) 2018), with output increasing faster than hours worked. In manufacturing, over the year labour productivity fell by 1.1%, with both output and hours worked falling. Compared with the previous quarter, output per hour in services increased by 0.5%, while manufacturing output per hour did not change.

Figure 3 shows longer-term trends for output per hour and its components since Quarter 1 (Jan to Mar) 2007. Services are shown in the left-hand panel, while manufacturing is shown in the right-hand panel. Manufacturing output per hour has been more volatile than services in recent years. This reflects a degree of divergence in manufacturing between gross value added (GVA) and hours, most noticeable in 2009 and between 2011 to 2012, whereas in services, GVA and hours follow similar trends.

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5. Unit labour costs have grown for the 15th consecutive quarter

Unit labour costs (ULCs) reflect the full labour costs incurred in the production of a unit of economic output, including social security and employers’ pension contributions. Changes in labour costs are a large factor in overall changes in the cost of production. If increased costs are not reflected in increased output, for instance, this can put upward pressure on the prices of goods and services – sometimes referred to as “inflationary pressure”. ULCs grew by 3.1% in Quarter 4 (Oct to Dec) 2018, compared with a year ago, reflecting a larger percentage increase in labour costs per hour than output per hour.

Figure 4 shows changes in ULCs since Quarter 1 (Jan to Mar) 2008 compared with the same quarter a year earlier. Holding other factors constant, increasing output per hour reduces ULCs as total labour costs remain constant while output rises. As a result, output per hour has its sign reversed in Figure 4. In this presentation, positive output per hour growth has a negative effect on ULC growth, while negative output per hour growth has a positive effect on ULC growth.

While quarter-on-year growth in ULCs has been broadly positive since the onset of the economic downturn, averaging around 1.6% since Quarter 1 2008, there has been substantial variation during this period. During the recent economic downturn, ULCs began to grow at a relatively high rate, reaching a peak of 6.3% by the end of the downturn in Quarter 2 (Apr to June) 2009 and remaining positive until Quarter 2 2010.

Figure 4 shows that the initial increase in ULC growth during the downturn was driven by falling output per hour, but from Quarter 2 2009 onwards, increasing labour costs per hour were the driving factor. Following the downturn, growth in ULCs began to slow, eventually becoming negative in Quarter 2 2010.

Following a period of low or negative growth, ULC growth averaged 2.1% per quarter for the past two years (since Quarter 4 2016). This increase broadly reflects higher hourly labour cost growth, with relatively little offsetting output per hour growth.

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6. Experimental sectional unit labour costs

In November 2012, we introduced a dataset of sectional unit labour costs. These experimental statistics provide estimates of sectional unit labour costs, returns to self-employed workers, the labour share of mixed income and the total value of labour costs. Although the methodology employed differs from the National Statistics estimates presented in this release, the datasets have been welcomed by users and we plan to incorporate a more regular section in the labour productivity statistical bulletin. We are also working in co-operation with the UK Statistics Authority to badge these datasets as National Statistics. For more information on the methodology of these experimental statistics, please see Productivity measures, sectional unit labour costs.

Across the whole economy in Quarter 4 (Oct to Dec) 2018, sectional unit labour costs increased by 2.6% compared with the same quarter a year ago, with production and manufacturing recording equally the largest increases in sectional unit labour costs by 3.7%. This is the highest quarter on year growth for production industries since Quarter 3 (July to Sept) 2013. The latest growth in sectional unit labour costs in the whole economy was due to increasing labour costs, which outpaced growth in output.

Since Quarter 4 (Oct to Dec) 2015, quarter-on-year ago growth rate in sectional unit labour costs for the whole economy have averaged 1.9%, with manufacturing and services averaging 2% each, and production averaging 2.2%. The average whole economy growth is affected by the allocation effect, as well as the growths of its three components. The allocation effect represents the effect of labour and other inputs moving between different sectors of the economy with different unit labour costs.

Figure 5 shows the average sectional unit costs quarter on year growth since Quarter 4 2015, for the whole economy, manufacturing, production and total services.

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7. Productivity by region

In 2017, productivity measured in output per hour varied significantly across the regions, with London and the South East being 30.4% and 7.1% respectively above the UK, while Wales and Northern Ireland were 16.3% and 16% below the UK, respectively.

Output per job also varied across the regions, with London and the South East being 39.2% and 5.1% higher than the UK respectively, while Wales and Yorkshire and The Humber were 18% and 15.7% below the UK respectively.

Figure 6 shows output per hour by region compared with the UK.

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9. What’s changed in this release?

Revisions

This release reflects revisions to gross value added resulting from Quarterly national accounts, affecting time periods since Quarter 1 (Jan to Mar) 2017.

Revisions to labour inputs result from the Labour market statistics affecting the time periods since Quarter 3 (July to Sept) 2011, which have taken on board the latest population estimates in the Labour Force Survey and from a review of the seasonal adjustment process. In addition, a boost to the Northern Ireland Labour Force Survey sample will have caused some minor revisions to estimates derived from that survey from the November 2017 to January 2018 period.

Unit labour costs incorporated revisions to average weekly earnings (AWE) in January 2019 due to incorporating Average Survey of Hours and Earnings (ASHE) data on small firms and a seasonal adjustment review. Further information is published in this article.

Revisions resulting from seasonal adjustment affect all periods, where seasonal adjustment is applied.

In this release we will not be presenting the experimental industry by region productivity statistics as these annual estimates were published in February 2019.

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10. Quality and methodology

The measure of output used in these statistics is the chained 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), using the income approach. 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 the measures of productivity for that region could show relative growth in productivity compared with other regions purely as a result of the price changes.

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 our Labour market overview, in three ways:

  • to achieve consistency with the measurement of GVA, the employee component of productivity jobs is derived on a reporting unit basis, whereas the employee component of the WFJ estimates is on a local unit basis

  • productivity jobs are scaled so industries sum to total Labour Force Survey (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. Labour productivity is then derived using growth rates for GVA and labour inputs in line with the following equation:


Industry estimates of average hours derived in this process differ from published estimates (found in Table HOUR03 in the Labour market overview 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 (ULCs) 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.

The equation for growth of ULCs can be calculated as:


Manufacturing unit wage costs are calculated as the ratio of manufacturing average weekly earnings to manufacturing output per filled job. On 28 November 2012, we published Productivity measures: sectional unit labour costs, describing new measures of ULCs 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 ULCs.

A research note, sources of revisions to labour productivity estimates, is available and further commentary on the nature and sources of the revisions introduced in this quarter is available in the UK productivity bulletin – introduction.

The Labour productivity Quality and Methodology Information report contains important information on:

  • the strengths and limitations of the data and how it compares with related data
  • uses and users of the data
  • how the output was created
  • the quality of the output including accuracy of the data
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Manylion cyswllt ar gyfer y Bwletin ystadegol

Marianthi Dunn
productivity@ons.gov.uk
Ffôn: +44 (0)1633 455086