A local unique identifier created by Statistics NZ. This identifier remains the same for an identity across IDI refreshes. This links to the corresponding household record in the household table.
A household is either one person who usually resides alone, or two or more people who usually reside together and share facilities (such as for eating, cooking, or a living area; and bathroom and toilet) in a private dwelling. Included are people who were absent on census night but usually live in a particular dwelling and are members of that household, as long as they were reported as being absent by the reference person on the dwelling form.