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Measures of Australia's Progress is designed for the Australian public, and the commentaries are meant to be easily understood by readers who may not be expert in either the subject matter or statistical methods. In many cases, our choice of indicator has had to strike a balance between considerations of approachability, technical precision, and the availability and quality of data.
The headline indicators in this publication are concerned with assessing dimensions of Australia's progress, not with explaining the underlying causes of change. The indicators are about the 'whethers' rather than the 'whys'.
For some dimensions, it is not yet possible to compile our preferred indicator. So a proxy indicator has been used instead, pending further statistical development work by the ABS or other researchers.
The supplementary indicators are intended to flesh out the information provided by the headline indicator. In some cases, they help bridge the gap between our preferred indicator and the best proxy indicator available today.
To choose the supplementary indicators, much the same criteria were applied - but we did not require that every supplementary indicator show unambiguously good and bad directions of movement or have an outcome focus.