survey year
household serial number
household tenure
metropolitan area size (pmsa/msa)
region and division
state (fips code)
ownership of dwelling
relationship to household head
cutoff for original poverty status, in dollars
Husband: age
Wife:    age
Husband: sex
Wife:    sex
Husband: citizenship status
Wife:    citizenship status
Husband: hispanic origin
Wife:    hispanic origin
Husband: employment status
Wife:    employment status
Husband: labor force status
Wife:    labor force status
Husband: hours usually worked per week at all jobs
Wife:    hours usually worked per week at all jobs
Husband: hours usually worked per week at main job
Wife:    hours usually worked per week at main job
Husband: hours worked last week
Wife:    hours worked last week
Husband: weeks worked last year
Wife:    weeks worked last year
Husband: worked full or part time last year
Wife:    worked full or part time last year
Husband: wage and salary income
Wife:    wage and salary income
Husband: union membership
Wife:    union membership
Husband: Class of Worker
Wife:    Class of Worker
Husband: RECODE of educ (educational attainment recode)
Wife:    RECODE of educ (educational attainment recode)
Husband: RECODE of race2 (race)
Wife:    RECODE of race2 (race)
Husband: Industry Classification
Wife:    Industry Classification
Husband: Occupation Classification
Wife:    Occupation Classification
2 quantiles of runiform()