This release contains updated estimates of output, inputs and productivity for public services in the UK between 1997 and 2013, in addition to new estimates for 2014.
Productivity of public services is estimated by comparing the growth in the total amount of output with growth in the total amount of inputs used. Productivity will increase when more output is being produced for each unit of input, compared with the previous year.
Separate estimates of output, inputs and productivity are provided for:
- adult social care (ASC)
- children’s social care (CSC)
- public order and safety (POS)
- social security administration (SSA)
Only inputs estimates are provided for police, defence, and other government services, as output is not easily measurable. It is therefore assumed that output is equal to the inputs used to create them and therefore productivity change in these services is zero.
Output, inputs and productivity for total public services are estimated by combining growth rates for individual services using their relative share of total government expenditure as weights.Back to table of contents
In 2014, total public service productivity grew by 0.2% compared to the previous year; productivity, as measured in this release, is at its highest since 1998
This is the fourth successive year of improving productivity and marks the longest consecutive period of productivity growth for total public services for which estimates are available.
Growth in 2014 was driven by growth in output for total public services of 1.6%, exceeding inputs which grew by 1.4%.
The annual average growth rate of total public service productivity from 1997 to 2014 was 0.1% per year.Back to table of contents
This release contains updated estimates of output, inputs and productivity for public services in the UK between 1997 and 2013, in addition to new estimates for 2014. Figures are published on a calendar year basis for consistency with the UK National Accounts.
UK public service healthcare output, inputs and productivity estimates are included in the measure of total public service productivity. More detail on healthcare output, inputs and productivity can be found in the separate article, Public Service Productivity Estimates: Healthcare 2014.
Productivity of public services is estimated by comparing growth in the total amount of output with growth in the total amount of inputs used. Productivity will increase when more output is being produced for each unit of input compared with the previous year. Estimates of output, inputs and productivity are given both as growth rates, which show the change from the previous year, and as indices, which show the trend over time (1997 to 2014).
Estimated growth rates of output and inputs for individual service areas are aggregated by their relative share of total government expenditure (expenditure weight) to produce estimates of total public service output, inputs and productivity. Therefore, where service areas have productivity growing at the same rate, a service area that accounts for a greater share of total expenditure will have a greater effect on overall growth rate for total public services.
Inputs are composed of labour (which can either be measured directly through means such as number of staff or indirectly by measuring service area expenditure on staff1), procurement (expenditure on goods and services), and consumption of fixed capital. These inputs, as appropriate, are adjusted for inflation using a suitable deflator. Expenditure data used to estimate inputs growth is based on annually published Maastricht (MAAST) supplementary data tables. These tables are consistent with estimates of government deficit and debt reported to the European Commission under the terms of the Maastricht Treaty. They are published on a calendar-year basis and provide the required detailed breakdown by the Classification of Functions of Government (COFOG).
The method of measuring output varies between and within service areas. Table 1 provides a breakdown of these, as well as a definition of output measure.
Table 1: Definitions of output measures
|Output Measure||Service areas||Coverage1(%)||Definition|
|Quantity output||Social security administration||100||The number of activities performed and services delivered. Growth in individual activities are weighted together using the relative cost of delivery.|
|Adult social care||100|
|Children’s social care||40|
|Public order and safety||100|
|Quality- adjusted output||Healthcare||90||Quantity output is adjusted for the quality of the services delivered. If the quality adjustment is positive, estimates of output growth will increase. Healthcare quality is measured using a combination of indicators including survival rates, waiting times and patient satisfaction. Education quality is measured using examination performance.|
|“Inputs = output”||Police||100||Some services we cannot measure output directly, so we assume the volume of output equals the volume of inputs used to create them, meaning that productivity growth will always be zero.|
|Children's social care2||60|
|Source: Office for National Statistics|
|1. Coverage refers to the proportion of service area’s output accounted for by the associated type of output measure.|
|2. For children's social care inputs isn’t strictly equal to output. Expenditure data are deflated to produce the inputs and outputs series, meaning that outputs are indirectly measured. However, different data sources are used for the inputs and output series so productivity growth is not expected to be zero.|
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A table summarising the methods for each service area is provided in Annex A, and further information on methods is available in our public service productivity sources and methods paper and quality and methodology information article.
Estimates in this release are provided for the UK, the amount of data included for each of the devolved administrations varies for each service area based on its availability. As England has the largest expenditure share, trends in output, inputs and productivity for England tend to determine the overall UK trend; therefore, much of the additional context provided in this article to aid interpretation of the estimates relates to services in England.
It is important to note that while these productivity estimates provide a measure of the amount of output produced for each unit of input, they do not measure value for money or the wider performance of public services. They do not indicate, for example, whether the inputs have been purchased at the lowest possible cost, or the extent to which the desired outcomes are achieved through the output provided.
The estimates in this release have an open revisions policy, meaning that each time a new article is published, revisions can occur for the whole of the period. Further details and explanation of revisions to previous estimates can be found later on in this article.
We also produce experimental quarterly estimates of total public service productivity. The experimental estimates use different sources to the annual estimates, containing less detail and necessarily involving a greater degree of estimation than the annual estimates. As a result, these experimental quarterly estimates are not replacements for the annual estimates in this article, and are merely intended to provide a more timely estimate for the more recent period. More detail on quarterly total output, inputs and productivity can be found in the separate article, Quarterly public service productivity (experimental statistics): July to Sept 2016.
Feedback on the use of these estimates and suggestions for improvements is essential for the future development of estimates for public service productivity. Therefore, we would like to invite you to complete a Data User Engagement Survey.
Notes for: Understanding public service productivity
- Agency staff are not captured as part of a service area's labour inputs but are instead included within a service area's procurement inputs.
In 2014, productivity for total public services was estimated to have increased by 0.2%, as output grew by 1.6% exceeding inputs growth of 1.4%. This followed a productivity rise of 0.1% in 2013, with the output and inputs of total public service productivity growing by 0.0% and falling by 0.1% respectively.
While experiencing weak growth (reflecting the similar growth paths of inputs and output), total public service productivity has been on an upwards trend in recent years, increasing consecutively over the last 4 years.
Breaking down the productivity estimate into the underlying changes in inputs and output of total public services, Figure 1 shows that, throughout the series, inputs and output have followed each other closely. Initially experiencing an upwards trend, growth in inputs slowed in the latest decade and contracted for the first time in 2011. This coincided with reductions in some departments as part of the Spending Review 2010. Since then inputs growth has remained broadly flat, although volume of inputs is still around 53% higher than in 1997. Output, on the other hand, has grown throughout the entire time series, overtaking inputs in 2011. As a result, and while experiencing relatively slower growth in recent years, UK public services output are around 54% higher than in 1997.Back to table of contents
To provide further context behind the recent changes in total public service productivity, as well as total inputs and output, we can observe the contributions of individual service areas to all 3 series.
The contribution an individual service area makes to growth in total public service measures is dependent on not only the growth in that service area, but also its weight relative to total expenditure. The breakdown of expenditure between service areas, for 2014, can be seen in Figure 2.
Since 1997, public service productivity has been weak, falling over the early part of the time series, but experienced an upwards trend from 2011 onwards. Figure 3 highlights some of the drivers behind this trend, showing contributions to total public service productivity growth by service area since 1998.
Over the whole of the series, both healthcare and education have been the key drivers of growth and contractions in total public service productivity. This is largely because, combined, they account for 54.3% of total public services.
Figure 3 shows that total public service productivity, while increased between 2010 and 2014, annual growth has slowed. While service areas such as healthcare, and public order and safety (POS) have provided a positive contribution to total productivity since 2010, negative contributions from the education service over the past 2 years and a negative contribution in 2014 from children’s social care, have meant productivity growth overall for UK public services has slowed.
It is worth noting that there is no observed contribution to total public service productivity from the indirectly measured service areas. This is in connection with the “inputs=output” convention and that these service areas can neither be more or less productive when comparing one year to another, as any growth or contract in inputs will be matched with an equally positive or negative growth in output.
Zero contributions from these service areas have a dampening effect on total public service productivity growth, relative to their expenditure weight. Estimates for total public service productivity growth in 2014, removing police, defence and other government services would have risen by 0.3%.
Figure 4 and Figure 5 show contributions of each service area to growth in total public service inputs and output respectively.
As mentioned earlier, a defining feature of recent growth in total public service productivity has been the relatively flat experience in inputs. Figure 4 helps identify some of the key drivers behind this.
Since the mid-2000s, growth in other government service inputs has slowed or contracted – this can also be seen in similar services like defence and police – and thereby have dampened growth of inputs. However, these service areas use the “inputs=output” convention and therefore growth or falls in inputs in these service areas are also reflected in falls in output.
From around 2009, positive contributions from most service areas began to shrink and a number of them turn negative. This is particularly prominent in 2011 where all service areas, barring adult social care and defence, contributed towards a contraction in total public service inputs. What this trend correlates to is reductions in departmental budgets and while growth in inputs has returned, it is noticeably subdued. Comparing average growth between the 2 periods, between 1997 and 2009 average annual growth for total public service inputs was 3.4%, whereas between 2009 and 2014, average growth was around 0.4% per year.
The UK’s total public service output since 1997 has grown, however, over the last few years that growth has slowed. While output experienced a return to growth in 2014, increasing by 1.6%, Figure 5 shows that the key driver of this was growth in healthcare outputs, reflecting healthcare outputs growing over the same period and the service area’s size relative to the entirety of UK public services. Negative contributions from service areas such as education, adult social care (ASC) and public order and safety (POS) subsequently dampened growth.Back to table of contents
There are 2 types of direct measures of output; the quantity of activities performed and services delivered (quantity output), and the quality of those activities and services (quality-adjusted output). The difference between the 2 types being that quality-adjusted output is quantity output, adjusted to account for changes in quality.
In the headline measures, quality adjustment is only applied to the output of healthcare and education. However, due to their combined size relative to total public services, this has a clear impact on the estimates of both total public service output and productivity.
Figure 6 compares total public service productivity with and without the quality adjustment for public service healthcare and education. The indices show that between 1997 and 2014, if total public service productivity had not been quality adjusted, it would have fallen by 5.7%, whereas quality adjusted total public service productivity increased by 0.9% over the same period. However, in recent years the impact of quality adjustment has been to slow growth in overall UK public service productivity. In 2014, non-quality adjusted productivity grew by 0.5%, marking the third consecutive year that it exceeded growth of overall quality-adjusted productivity. With the inclusion of quality adjustment, productivity for total public services estimated to be slower, growing by 0.2% between 2013 and 2014.
Further information on the methods of quality adjustment and their impact on estimates of output and productivity for the healthcare and education services areas are available in their associated publications.Back to table of contents
For service areas where it is hard to estimate the quantity of output (due to the lack of market transactions and/or the services are collectively consumed) it is assumed that the volume of output is equal to the volume of inputs used in producing them. This is known as the “inputs=output” convention and it is estimated that productivity growth for these services is zero. This applies to the police, defence and other government services, which combined account for 31.8% of total public service expenditure in 2014.
In addition to police, defence, and other services, the “input=output” convention is also applied to approximately 10% of healthcare output (capturing services delivered by non-NHS providers). Children’s Social Care (CSC) output relating to non-looked after children (60% of all CSC output) is also measured indirectly using the volume of inputs to those services. Together these indirectly measured outputs account for a further 5.2% of total expenditure.
These zero contributions to productivity growth from indirectly measured or “inputs=output” service areas limits the growth in total public service productivity. The extent to which they affect growth of total public service productivity is proportional to their share of total expenditure. The proportion of total expenditure for indirectly measured service area output has been steadily decreasing from 41.7% in 1997 to 37.0% in 2014 – chiefly driven by defence’s share shrinking. The impact of indirectly measured output on total public service productivity has therefore decreased over the time series.
The following sections provide more detailed data on output, inputs and productivity growth rates and indices for the individual service areas. Where possible, commentary has been provided to aid interpretation.Back to table of contents
Healthcare productivity grew in 2014, by 2.3%, driven by growth in output of 5.2%, with a 2.8% increase in inputs. This is the fifth consecutive year of productivity growth with productivity growing on average 0.9% each year between 1997 and 2014.
A fuller analysis of healthcare productivity can be found in the article Public Service Productivity Estimates: Healthcare 2014 that contains greater detailed information on both the estimates and methods used to create them.Back to table of contents
In 2014, productivity of UK education services area are estimated to have fallen by 2.6%, as a result of inputs growing by 1.6% while quality-adjusted output fell by 1.0%. As shown in Figure 8, this is the second consecutive annual contraction in education service productivity. While the education service has experienced contractions in productivity previously, these 2 are different in that both the inputs and quality-adjusted output series are working against productivity growth, growing and contracting respectively.
Caution should be used when interpreting the change in the quality-adjusted output trend from 2008 onwards. Over this period, there have been changes to the examinations, which count towards school performance statistics in England that influenced both the number and type of examinations sat by some pupils. As a result, some of the change in attainment statistics used for quality adjustment may not be entirely caused by changes in the quality of education provided. In particular, changes to school performance tables announced by the Department for Education – as a result of Professor Alison Wolf’s review of vocational education – limited the size and number of non-GCSEs that counted towards performance which impacted on attainment statistics from academic year 2012 to 2013 (Revised GCSE and equivalents results in England, 2013 to 2014).
Investigating both inputs and output separately, Figure 9 shows inputs growth of education services by component weighted by expenditure share, showing how growth in one type of input (for example, labour) contributes to the growth in total education service inputs. In 2014, inputs growth was 1.6%; the majority of growth coming from labour, contributing an increase of 2.0 percentage points. However, this was partially offset by a contraction in procurement (the purchase of goods and services), pulling down growth by around 0.5 percentage points.
Since 2000, public service education inputs have grown, with the one exception of a 0.3% decrease in 2011. Historically, growth has been driven by changes in both labour and procurement inputs. Between 1997 and 2014, labour inputs have grown at an annual average rate of 1.0% while procurement has grown on average by 0.8%. The annual average growth rate of inputs over the whole series from 1997 to 2014 was 2.0%.
Consumption of fixed capital, on the other hand, has had a relatively smaller effect on overall growth – on average growing annually by 0.1%. After the largest contribution to growth in capital input of 0.4% in 2010, growth rates have slowed over time to 0.1% in 2014. Due to a change in data source, estimates of consumption of capital have decreased in magnitude across the entire series when compared to previous estimates. This is discussed in more detail in the revisions section for this article.
Focusing on education’s output, quality-adjusted output fell in 2014, contracting by 1.0%, following a fall of 1.7% in 2013. Quantity output, however, rose in both 2013 and 2014, increasing by 0.6% and 1.3% respectively. The cause of the difference between these 2 measures is the impact of quality adjustment. The impact of this quality adjustment, as well as annual growth in both quantity and quality-adjusted education output, is shown in Figure 10.
Overall, the quality adjustment for educational output has been positive, increasing the annual average growth rate of output between 1998 and 2014, from 0.4% to 1.8%. When observing the mid- to late-2000s we can see that it caused education output to be positive. However, over the last 3 years, quality in educational output is estimated to have fallen and had a negative contribution to education quality-adjusted output. As noted above, however, this fall in the quality adjustment does not necessarily reflect a fall in the quality of education received, but may instead reflect rather changes to the number and types of qualifications that count towards GCSE performance tables in England.Back to table of contents
Public order and safety (POS) saw productivity increase in 2014, rising by 4.6%. This is the second consecutive year of growth, POS productivity growing by 2.6% in 2013. However, between 1997 and 2014 productivity for POS has fallen, on average, by 1.8% per year.
Estimates for POS presented here include activities carried out by the fire services, courts (including probation) and the prison service. While a part of the public order and safety government expenditure classification (as defined by the Classification of Function of Government), the police service is treated as a separate service area within this publication. Other elements of public order and safety not listed as above (that is, POS not else wise classified) are captured with in estimates for other government services.
Breaking down the productivity estimates into the underlying changes in inputs and output of POS, Figure 14 shows that, prior to 2006, POS output had remained broadly flat but since then has been on a downwards trend.
The courts and probation service mainly drive variation in output, accounting for around 50% of total POS expenditure.
There was a fall in output for the courts service in 2014 of 4.8% caused by falls in activity in all services except Crown Courts. This fall is faster than the long-term trend with an annual average fall in output of 2.5% per year between 1997 and 2014, but is consistent with falls in the most recent years, with an annual average fall in output between 2010 and 2014 of 4.7% per year.
By contrast, growth in fire services and prison services output have had relatively less impact. Capturing activities such as responses to fires, flooding and assisting at road traffic collisions, fire service output continued its downward trend contracting by 3.9% in 2014. The largest proportion of activities involved attending false alarms, which have decreased over the series. A corresponding increase in output for prevention activities could be linked to a decrease in activities for fire responses.
Probation services experienced a continued decrease in output, falling by 1.0%. It's sixth consecutive contraction. While prison service output, following a contraction of 2.8% in 2013, grew by 1.2% in 2014.
Looking at inputs over time, prior to 2006 POS’s inputs were on a general upwards trend, driven by increasing spend on courts. However, a 7.1% fall in 2014 marks the fifth consecutive contraction in POS inputs. Excluding the fall in 2011, this has been as a result of a reversal of that trend. Now driven downwards by contraction of inputs into UK courts. In particular, falling expenditure on Legal Aid coinciding with the Legal Aid, Sentencing and Punishment of Offenders (LASPO) Act 2012, which, amongst other things, removed financial support for most cases involving housing, welfare, medical negligence, employment, debt and immigration.Back to table of contents
Output for police services, defence and other government services is measured using the “inputs = output” convention which assumes that the volume of output is equal to the volume of inputs used in producing the output. As output will always be equal to inputs under this convention, productivity remains constant with a growth rate of zero. Combined, police, defence and other government services had an expenditure share of 31.8% in 2014.
Breaking down trends and growths into the 3 individual service areas, Figure 15 shows that while experiencing the slowest growth over the entire period – being 8.1% larger than in 1997 – police inputs experienced strong positive growth in 2014, growing by 2.5%. This is the service area’s first period of growth since 2009 and, while having a mixed experience amongst its components, has been driven by increases in expenditure on central government labour.
Defence, on the other hand, experienced flat growth (0.0%) in 2014 relative to the previous year. This followed a relatively sharp contraction in 2013 that reflected falls in expenditure on foreign military aid, although estimates were revised, showing a smaller contraction than previous estimated.
Finally, in 2014 other government services – comprising of services such as economic affairs, recreation, and housing (see Annex B for more details) – grew by 1.4%. Overall, other government services have experienced the strongest growth – relative to other indirectly measured service areas. However, this is chiefly attributable to strong growth in the early part of the series and since 2005, inputs growth has been relatively weak, averaging just 0.1% each year between 2005 and 2014.Back to table of contents
All estimates, by definition, are subject to statistical “error”, but in this context, the word refers to the uncertainty inherent in any process or calculation that uses sampling, estimation or modelling. Most revisions reflect either the adoption of new statistical techniques, or the incorporation of new information, which allows the statistical error of previous estimates to be reduced.
Public service productivity estimates operate an open revisions policy. This means that new data or methods can be incorporated at any time, and will be implemented for the entire time series. As this article is produced using more timely data it involves a degree of estimation where data are incomplete.
As shown in Figure 16, revisions to previous estimates mean that total public service productivity was lower than initially calculated, growing by 0.1% as opposed to growing by 0.7% in 2013.
However, when comparing over the entirety of the time series Figure 16 also shows that, while experiencing a contraction in the early 2000s, it was to a lesser degree than previously estimated.
Revisions have been made to estimates for all service areas due to:
revisions made to data by data providers
the replacement of projected data with actual data
re-estimation of forecasts and backcasts
revisions to UK National Accounts as a result of changes from the implementation of new guidelines under the European System of Accounts 2010 (ESA10)
Revisions due to methods and/or data changes in individual service areas are summaries below.
Changes to capital consumption data
Estimates of capital consumption within this article have experienced revisions across the entire time series.
These changes reflect a number of improvements and key changes made to the methodology and disaggregation for estimating capital stocks and the consumption of fixed capital. These changes have had a small impact on the data for the total economy as well as the asset and industry breakdowns as the assumptions within the PIM (perpetual inventory method) model are now applied at a total economy level rather than for each sector individually. However, it maintains sector (that is, Households and Central Government) proportions across time.
Implemented by National Accounts, these changes reflect, as well as complying with the European System of Accounts 2010 (ESA10), alterations and adjustments made to address a number of issues raised with the quality of the data that had led to the withdrawal of capital stocks estimate from publication in 2011.
A full explanation of these changes, including assessments of impact are available in the articles methodological changes to the estimation of capital stocks and consumption of fixed capital and impact of the methodological changes to the estimation of capital stocks and consumption of fixed capital.
Changes to education capital consumption data
Previously Volume Index of Capital Services (VICS) for non-market education estimates was used as the measure for capital consumption in the inputs of education services. This was used because movement in capital services (rather than capital stocks) are the preferred method to measure changes in capital inputs in the framework for measuring multi-factor productivity (MFP).
However, from 2014 onwards VICS is no longer produced for non-market services as explained within Volume index of UK capital services (experimental): estimates to 2014.
As a result, estimates within this article use an alternative data source; General Government consumption of fixed capital within the education industry. The impact of this has been changes to the magnitude of growth across the series, as well as reduce capital’s share of education expenditure. Previously accounting for, on average, 14.2% of total education expenditure; this has dropped to 3.7% on average between 1997 and 2014. This has the added benefit of bringing estimates of capital for education in line with the remaining government services.
Changes to other government services
When compared to previous estimates, estimates between 1997 and 2013 saw upwards revisions over the entire time series for other government services, having a minor but cumulative effect. The cause of these revisions was because of Bluebook 2015 complying with the European System of Accounts 2010 (ESA10) on determining the classification of a number of institutional units and flows. Therefore, Blue Book 2015 and Pink Book 2015 included the reclassifications of Network Rail, Transport for London’s subsidiaries, contributions to Multilateral Development Banks, 3G/4G licenses and the Vehicle Registration Tax. As a result, while expenditure has not necessarily been revised upwards, other government services now captures a number of other expenditures, previously classified elsewhere. More detail and guidance on these reclassifications and their impact are published in our Methodological Improvements to National Accounts for Blue Book 2015: ClassificationsBack to table of contents
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