HOW OVERCOUNT AND UNDERCOUNT CONTRIBUTE TO THE ESTIMATED RESIDENT POPULATION
The estimated resident population (ERP) is the official estimate of the population calculated quarterly by the ABS. Accurate estimates of the Australian resident population are essential for the allocation of seats in the Federal House of Representatives as well as distributing Commonwealth funding to states and territories.
These population estimates are also used for demographic, social and economic studies. The validity of these population estimates depends on a number of factors, one of which is the accurate measurement of net overcount or net undercount in the Census.
Following each Census, the ERP for 30 June of the Census year is rebased using the Census data, adjusted by the PES.
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