age
, a numeric variable containing the interviewee's age in
years;
race
, a factor with 20 levels denoting various racial/ethnic
origins;
gender
, a factor with levels "Male"
and "Female"
.
grade90
, a factor containing the highest completed school
grade from "3RD GRADE" to "8TH YR COL OR MORE", with 18 levels;
income06
, a numeric variable, income in 2006 in 10000-USD
units;
income96
, a numeric variable, income in 1996 in 10000-USD
units;
income90
, a numeric variable, income in 1990 in 10000-USD
units;
partner
, a factor encoding whether the interviewee has a
partner, with levels "No"
and "Yes"
;
height
, a numeric variable, the height of the interviewee;
weight
, a numeric variable, the weight of the interviewee;
famsize
, a numeric variable, the number of family members;
genhealth
, a factor with levels "Excellent"
,
"Very Good"
, "Good"
, "Fair"
, "Poor"
encoding
the general health status of the interviewee;
illegalact
, a numeric variable containing the number of illegal
acts committed by the interviewee;
charged
, a numeric variable containing the number of illegal
acts for which the interviewee has been charged;
jobsnum90
, a numeric value, the number of different jobs ever
reported;
afqt89
, a numeric value, the percentile score of the "Profiles,
Armed Forces Qualification Test" (AFQT);
typejob90
, a factor with 13 levels encoding different job
types;
jobtrain90
, a factor with levels "No"
and "Yes"
encoding whether the job was classified as training.