This is a 16-digit numeric variable.
HHID reports the household identifier in the original sample.
Note that in samples where more than one survey is included, HHID is not unique. Use IDENT to identify uniquely cases within a sample and to link persons and activities records in hierarchical files.
- All persons.
- 1965, 1975, 1985, 1993, 1995, 1998