CONTROL: Control number
Text: This is the scrambled control number from the masterfile. It is used to preserve confidentiality and to enable longitudinal matches to earlier files.
Location: 1-12 (width: 12; decimal: 0)
Variable Type: character
Source: This variable was taken from: American Housing Survey, 1997: National Microdata.
Copyright: ICPSR has an FAQ on copyright and survey instruments.