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Eastern Region Alliance area

Equivalised household income

Assuming all households were the same size, the 'highest' quartile was the largest income group in Eastern Region Alliance area in 2011.

While Household Income is a useful measure, it is difficult to tell if changes over time and between geographic areas are due to actual changes in income levels, or due to changes in household size and composition. For example, an increase in lower income households could be due to job losses in key economic sectors, or simply due to decreasing household size as adult children leave home.

Equivalised Household Income puts all households on an equal footing independent of household size and composition to enable a true comparison between areas and over time. It is an indicator of the income resource available to a household of standard size and is the best measure of the changing economic fortunes of households living in Eastern Region Alliance area.

A detailed explanation of how Equivalised Household Income quartiles are calculated and interpreted is available in specific data notes.

Derived from the Census question:

'What is the total of all wages/salaries, government benefits, pensions, allowances and other income the person usually receives?'

Family, group and lone person households

Equivalised household income quartiles
Eastern Region Alliance area20112006Change
Quartile groupNumber%City of Tea Tree Gully %Number%City of Tea Tree Gully %2006 to 2011
Lowest group19,61519.418.619,10919.518.0+506
Medium lowest22,05521.824.520,69821.123.4+1,357
Medium highest25,22724.928.724,12424.629.3+1,103
Highest group34,24333.928.234,24434.929.3-1

Source: Australian Bureau of Statistics, Census of Population and Housing 2006 and 2011. Compiled and presented by .id , the population experts.

Equivalised household income - Quartile group dollar ranges
Calculated from income data for South Australia Weekly income by Census year
Equivalised household income ranges
2011
2006
2001
Lowest group $0 to $395 $0 to $332 $0 to $268
Medium lowest $396 to $689 $333 to $554 $269 to $437
Medium highest $690 to $1,101 $555 to $880 $438 to $690
Highest group $1,102 and over $881 and over $691 and over

Equivalised household income quartiles, 2011
Equivalised household income quartiles, 2011 Highest group, City of Tea Tree Gully: 28.2% Medium highest, City of Tea Tree Gully: 28.7% Medium lowest, City of Tea Tree Gully: 24.5% Lowest group, City of Tea Tree Gully: 18.6% Highest group, Eastern Region Alliance area: 33.9% Medium highest, Eastern Region Alliance area: 24.9% Medium lowest, Eastern Region Alliance area: 21.8% Lowest group, Eastern Region Alliance area: 19.4%
Source: Australian Bureau of Statistics, Census of Population and Housing, 2011 (Enumerated data)
Compiled and presented in profile.id by .id, the population experts.
Change in equivalised household income quartiles, 2006 to 2011
Change in equivalised household income quartiles, 2006 to 2011 Highest group, Eastern Region Alliance area: -1 Medium highest, Eastern Region Alliance area: +1,103 Medium lowest, Eastern Region Alliance area: +1,357 Lowest group, Eastern Region Alliance area: +506
Source: Australian Bureau of Statistics, Census of Population and Housing, 2006 and 2011 (Enumerated data)
Compiled and presented in profile.id by .id, the population experts.

Dominant groups

Equivalised income quartiles allow us to compare relative income-earning capabilities across time. Because the data is equivalised, households of different size and composition are placed on an equal footing.

Analysis of the distribution of households by income quartile in Eastern Region Alliance area compared to the City of Tea Tree Gully shows that there was a greater proportion of households in the highest equivalised income quartile, as well as a greater proportion in the lowest equivalised income quartile.

Emerging groups

The most significant change in Eastern Region Alliance area between 2006 and 2011 was in the medium lowest quartile which showed an increase of 1,357 households.