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1301.0 - Year Book Australia, 2003  
Previous ISSUE Released at 11:30 AM (CANBERRA TIME) 24/01/2003   
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Contents >> National Accounts >> Measuring GDP

There are three ways of measuring GDP:

Income approach - which measures GDP by summing the incomes accruing from production: compensation of employees (wages and salaries, and employers' social contributions); gross operating surplus (profits); gross mixed income (income from unincorporated businesses, including a return to the owners of these businesses for their labour); and taxes less subsidies on production and imports.

Expenditure approach - which involves summing all final expenditures on goods and services (i.e. those goods and services which are not processed any further), adding on the contributions of changes in inventories and the value of exports, and deducting the value of imports. Final expenditures consist of final consumption expenditure and gross fixed capital formation. Exports are included in GDP because they are part of Australian production even though they are sold to overseas purchasers. Imports are deducted because, although they are included in final expenditures (e.g. when someone buys an imported video recorder its value is included as part of household final consumption expenditure), they are not part of Australian production.

Production approach - which calculates GDP by taking the value of goods and services produced by an industry (its output at basic values, which implicitly includes taxes less subsidies on production) and deducting the cost of goods and services used up by the industry in the productive process (intermediate consumption), which leaves the value added by the industry. GDP is then obtained by summing value added across all industries, and adding taxes less subsidies on products.

While each approach should, conceptually, deliver the same estimate of GDP, if the three measures are compiled independently using different data sources then different estimates of GDP result. However, the Australian national income, expenditure and product estimates have been integrated with annual balanced supply and use tables which are available for 1994-95 to 1999-2000. Integration with balanced supply and use tables ensures that the same estimate of GDP is obtained from the three approaches, and thus annual estimates using the income, expenditure and production approaches are identical for the years for which supply and use tables are available.

Prior to 1994-95, and for the latest financial year, the estimates using each approach are based on independent sources, and there are usually differences between the income, expenditure and production estimates. Nevertheless, for these periods, a single estimate of GDP has been compiled. Table 29.1 shows time series of chain volume measures for GDP, and GDP per capita, from 1974-75 to 2000-01. (For a discussion of chain volume measures, see the section Chain volume or 'real' GDP.)


29.1 GDP, Chain volume measures(a)
GDP
GDP per capita
$m
$

1974-75
281,051
20,339
1975-76
288,601
20,665
1976-77
297,869
21,109
1977-78
300,193
21,022
1978-79
316,748
21,941
1979-80
324,484
22,222
1980-81
334,864
22,611
1981-82
345,289
22,935
1982-83
336,256
21,990
1983-84
354,124
22,869
1984-85
372,051
23,725
1985-86
387,722
24,383
1986-87
397,487
24,628
1987-88
418,794
25,538
1988-89
435,725
26,114
1989-90
451,975
26,683
1990-91
451,568
26,289
1991-92
452,773
26,029
1992-93
469,353
26,687
1993-94
487,608
27,446
1994-95
507,945
28,280
1995-96
529,355
29,094
1996-97
548,815
29,795
1997-98
573,244
30,779
1998-99
603,447
32,037
1999-2000
629,212
33,037
2000-01
641,370
33,281

(a) Reference year 1999-2000.

Source: Australian System of National Accounts (5204.0).


The chain volume measure of GDP increased by 1.9% in 2000-01, following an increase of 4.3% in 1999-2000. For some analytical purposes, it is important to allow for the impact of population growth on movements in GDP. Annual growth in GDP per capita has been about one to two percentage points lower than that for GDP since the mid 1970s and was negative in 1977-78, 1982-83, 1990-91 and 1991-92 (graph 29.2). In 2000-01 GDP per capita increased by 0.7%.

Graph - 29.2 GDP and GDP per capita



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