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Age (AGEP, AGE10P, AGE5P, IFAGEP)
2 Age imputed
In 2016 the ABS introduced a new approach to age imputations. Improvements were made to the age imputation methodology to improve processing efficiency and data quality. The new age imputation methodology uses a two step procedure together with age bounding rules to impute age. First, a linear regression model is used to model the likely age of recipients so as to rank their tendency be either younger or older. This ranking is then used in combination with other reported characteristics to impute an appropriate age value to recipients from similar individuals in the responding population.
A question relating to Age has been asked at every Census since 1911. Since 2006, respondents have had the option to report either Date of Birth or Age in years. No changes were made for 2016.
Using the Imputation Flag for Age, the non-response rate for this variable in 2016 was 5.5% (4.2% in 2011). For more information, refer to Understanding Census data quality.
Data usage notes
Respondents occasionally make errors in reporting their age or date of birth, such as reporting their last birthday or the date they filled out their Census form rather than their date of birth, parents filling in the form on their children's behalf and inadvertently reporting their own age or date of birth for their children, character transposition errors, or other typographical errors (e.g. sticky key repetition). The latter two are particularly relevant to the online version of the Census form.
Data captured from written responses carries a small risk of character recognition error, mainly caused by poor handwriting or respondents writing outside the question box. The vast majority of individual characters written on paper forms met pre-set recognition confidence levels and were accepted without further examination. Characters that failed given recognition confidence levels, or responses where there was a discrepancy of more than three years between age last birthday and date of birth, were sent to clerical officers for further determination based on visual inspection of an image of the response.
Other checks on age (such as unlikely combinations of age and other variables) were made at various stages during processing, to ensure an acceptable level of quality was maintained.
A definition of Age is available in the 2016 Census Dictionary.
A definition of Imputation Flag for Age is available in the 2016 Census Dictionary.
For the official ABS estimate of demographic data on the Australian population, users should refer to Australian Demographic Statistics.
Household Form question image
Question 4 as it appeared on the 2016 Census Household Paper Form:
A text only version of the online Census Household form is available from the Downloads tab.
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