Getting real with GDP (update)

Just how large is the UK economy and how rapidly is it growing? These were questions we asked, back at the turn of the year, in Getting real with GDP when reviewing economic data for the third quarter of 2010. We update this blog in light of the latest Quarterly National Accounts release from the Office for National Statistics.

The latest Quarterly National Accounts release estimates the value of our economy’s output during Q1 of 2011 at £375.3 million. When measured across the latest four quarters, i.e. from the start of Q2 2010 to the end of Q1 2011, the total value of our economy’s output was £1.472 trillion. Across calendar year 2010 the UK’s GDP is estimated to have been £1.455 trillion.

When analysed in terms of the total expenditure on the goods and services produced in the latest four quarters, household final consumption contributed £931 billion of Gross Domestic Product. In other words, household expenditure over these four quarters was equivalent to 63% of GDP, almost exactly in line with its average since 1948. This demonstrates the importance of spending by households for short-term economic growth. Households help to shape the business cycle.

Another important expenditure-component of GDP is gross capital formation. This is capital expenditure by the private and public sector and is estimated to have been £219.6 billion over the latest four quarters, equivalent to 15% of GDP. As well as affecting current levels of GDP, gross capital formation also affects our economy’s potential output. In other words, changes in capital expenditure can impact both on the demand-side and the supply-side of the economy. Interestingly, the long-term average share for gross capital formation in GDP is around 18% and so about 3 percentage points higher than is currently the case.

So far we have looked at the level of economic activity measured at current prices. But, what about the rate at which the economy is growing? When analysing the rate of economic growth economists look at GDP at constant prices. By doing this economists can infer whether the volume of output has increased. This is important because in the presence of price rises, an increase in the value of output could occur even if the volume of output remained unchanged or actually fell. For instance, in 1974 the volume of output or real GDP fell by 1.3%, but because the average price of our domestic output – the GDP deflator – rose by 14.9%, GDP measured at current prices rose by nearly 13.4%.

The latest ONS figures show that in the first quarter of 2011 real GDP grew by 0.5% (nominal GDP grew by 1.7%). This follows a 0.5% fall in real GDP the final quarter of 2010 (nominal GDP grew by 1.2%). Compared with Q1 2010, the volume of output of the UK economy in Q1 2011 is estimated to have grown by 1.6%.

Exports were the fastest growing component of aggregate demand in Q1, rising in real terms by 2.4%, while import volumes decreased by 2.4%. Export volumes in Q1 were 9.3% higher than a year earlier. In contrast, capital expenditures contracted sharply in the first quarter, falling by 4.2%. This follows on the back of a 0.6% fall in the final quarter of last year. This has reversed much of the strong capital expenditure growth seen during the earlier part of 2010.

We finish by looking at the growth in household spending. In the first quarter of the year real household spending fell by 0.6%. This follows a 0.2 fall in Q4 2010 and zero growth in Q3 2010. This helps to explain some of the difficulties that particular retailers have faced of late. Some context to these disappointing consumption numbers is provided by patterns in household sector disposable income. The sector’s disposable income fell by 0.8% in Q1 2011 which follows on from a 0.9% fall in the last quarter of last year. The result of this is that the household sector’s real disposable income in Q1 2011 was 2.7% lower than in Q1 2010. This was the fastest annual rate of decline since the third quarter of 1977.

Articles

Household incomes sees biggest fall since 1977 BBC News (29/6/11)
UK service sector sees biggest fall for 15 months BBC News (28/6/11)
UK economic growth revised down BBC News (29/6/11)
Service sector output slumps Guardian, Phillip Inman (29/6/11)
Household raid savings as income squeezed Independent, Sean O’Grady (29/6/11)
Poor GDP numbers add pressure on Osborne Guardian, Phillip Inman (28/6/11)
UK economy suffers blow as tepid growth confirmed Telegraph (28/6/11)
Service sector slumps deals heavy blow to economic recovery hopes Scotsman, Natalie Thomas (30/6/11)

Data

Latest on GDP growth Office for National Statistics (28/6/11)
Quarterly National Accounts, 1st Quarter 2011 Office for National Statistics (28/6/11))
ONS Time Series Data Office for National Statistics
For macroeconomic data for EU countries and other OECD countries, such as the USA, Canada, Japan, Australia and Korea, see:
AMECO online European Commission

Questions