Home |  site-map |  indonesia |  indonesian-single-source-articles |  asteroid-user-registration |

Roy Morgan OZ Panel Login  |  Mail Diary Panel Login |   careers |  contact-us |

April 2009

Summary:

Newly revised population adjustments from the ABS will be incorporated by Roy Morgan Research in data from April 2009 onwards.

Some population differences are noticeable and will result in changes to estimates of readership, product consumption and other data.

Previously released data will not be amended. Phasing in of the new ABS population changes will minimise their impact.

Most noticeable population changes have occurred with:

• Decreases in Brisbane, Victorian country and over 65 year olds.
• Increases in Melbourne and Queensland country and the total population.

Application of the Australian Bureau of Statistics (ABS) Labour Force Survey population adjustments to Roy Morgan Research Single Source Weighting

Background:

The February 2009 edition of the Labour Force Survey - 6202.0 Labour Force, Australia - published by the ABS 12/03/2009 included revised population benchmarks from the 2006 Census. The ABS revise the population benchmarks used in the Labour Force Survey every five years following the Census of Population and Housing.

Roy Morgan Research population estimates are calculated on trends in ABS published Statistical Local Area (SLA) population estimates, supported by other ABS published information including the Labour Force Survey. We have carefully reviewed the revised population estimates and will be incorporating changes resulting from the ABS revision into the April 2009 processing of Roy Morgan Single Source.

In incorporating the revised population benchmarks from the Labour Force Survey, we can report that the new national population estimate for people 14+ has increased by 47,100 from 17,593,200 people in February 2009 to 17,640,300, up 0.3%.

Roy Morgan Research will not be revising already published figures. These changes will have only a minimal initial impact as only three months out of twelve in the next quarterly report will be weighted according to the revised figures. There will then be a progressive - but still small - effect as an increasing proportion of the 'latest twelve months' is based on the new figures.

Male population benchmarks have been revised upward by approximately 3,800 men to 8,697,200 (up 0.04%) with the female population rising 43,300 to 8,943,100 (up 0.5%). Benchmarks for older age groups have generally decreased with the Age 65 and over group decreasing by approximately 43,300 people (down 1.5%). In contrast, younger age groups such as those under 35 have grown by 60,600 (up 1.0%).

At a capital city level there are some instances of changes reflecting differences between the ABS estimated population growth for the city and the actual growth. Population benchmarks for Melbourne have increased by 60,700 (up 1.9%) whilst Sydney has decreased by 28,900 (down 0.8%).

In Victoria country a decrease of 33,900 (down 2.8%) has partially offset the increase in Melbourne (up 60,700) with the State 14+ population now 4,416,900 (up 0.6%). Whilst in New South Wales the population of the remainder of the State (including the ACT) has increased by 5,000 (up 0.2%) for an overall decrease, after Sydney dropped by 28,900, to 6,044,300 (down 0.4%).

These new projections apply to Roy Morgan Single Source data relating to April 2009 and later months.

© 2012 Roy Morgan Research. All Rights Reserved
privacy-statement