identifier for panel individual; 716 total
year interviewed (1982, 1983, 1985, 1987, 1988)
ln(wage/GNP deflator)
usual hours worked
age in current year
current grade completed
1 if college graduate
1 if married, spouse present
1 if never yet married
1 if not SMSA
1 if central city
1 if south
1 if black; 0 if white
1 if union member
total work experience
exper^2
job tenure, in years
tenure^2