This edition of Estimates of Personal Income for Small Areas incorporates changes compared with the previous release.
Data are now presented on ASGS 2016 and LGA 2016 boundaries, compared with ASGS 2011 and LGA 2014 boundaries previously.
Coverage has been improved through the introduction of de-identifed payment summary data from the Australian Taxation Office (ATO). These payment summaries are submitted by employers to the ATO and allow for employee income to be geocoded to regions for earners who have not lodged an income tax return.
Income data is now assigned to the regions that earners had stated on the income tax return at the time of the form submission. This is a change to the previous release where earners' regions were determined at the time of data extraction by the ATO. This results in a more accurate way of assigning income to a region, as earners may move address between lodgment of the return and the extraction of data by the ATO.
The method of confidentialisation has changed since last release to include perturbation. Perturbation is a technique which has been developed to randomly adjust cell values. When the technique is applied, all cells are slightly adjusted to prevent any identifiable data being exposed.
Due to the changes in this release, users are cautioned in comparing the data with the previously released estimates for 2010-11 and 2012-13.