Country of birth of parents (BPPP)
This variable indicates if a person's father and/or mother was born in Australia or overseas. It combines responses for Country of birth of mother (BPFP) and Country of birth of father (BPMP) to identify the country of birth of a person’s parents (Country of birth of parents, BPPP).
The data gained from this variable, together with Country of birth of person (BPLP), allows the study of first-generation and second-generation Australians.
|1||Both parents born overseas|
|2||Father only born overseas|
|3||Mother only born overseas|
|4||Both parents born in Australia|
|&||Not stated - birthplace for either or both parents not stated|
Number of categories: 6
See Understanding supplementary codes for more information.
Question(s) from the Census form
In which country was the person’s father born?
In which country was the person’s mother born?
History and changes
The two questions used to derive this variable were first asked in the 1921 Census, but not asked again until 1971. Since then, they have been asked in every Census.
Until 2001, the question asked people to write in their parents’ birthplaces. In the 2001 Census a question was also asked on ancestry. As a result, for the 2001-2011 Censuses the country of birth of parents response categories were changed to ask whether a person’s parents were born in Australia or overseas rather than collect detail on the parents’ overseas birthplaces.
For 2016 the name of the variable changed from 'Birthplace of parents' to 'Country of birth of parents'. After consultation with key data users, the question responses changed to again ask the specific birthplace of parents where it is not Australia.
No changes have been made for 2021.
Data use considerations
The questions used to derive BPPP (Country of birth of mother and Country of birth of father) changed in 2016. In 2011 both items only asked if a person's mother and father were born in Australia or overseas, whereas since 2016 the specific country of birth is asked for both parents.
This variable does not have a non-response rate as it is created during Census processing by using responses from more than one question on the Census form.