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Description

CNTYGP98 is an un-recoded variable that identifies the household's 1980 county group of enumeration. It is state-dependent; it must be read in conjunction with state codes, STATEICP and STATEFIP.

1980 county groups are (usually) contiguous areas with a combined population of 100,000+ residents; they may consist of actual county groups, but they may also be single counties, single cities, or other census-designated places (separate or combined) meeting the 100,000+ population criterion. The State sample individually identifies most counties with 100,000+ residents and groups most other counties into "reasonable analytic units," often as defined by state planning agencies; none of these county groups cross state lines. The Metro sample county groups allow for the identification of most Standard Metropolitan Statistical Areas with 100,000+ residents, and they frequently cross state lines in the process.