identifier for panel individual; 716 total
year interviewed: 1987 or 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
= (lwage - lwage[_n-1])
= (exper - exper[_n-1])
= (tenure - tenure[_n-1])
= (south - south[_n-1])
= (union - union[_n-1])
= (exper2 - exper2[_n-1])
= (tenure2 - tenure2[_n-1])
=1 if year 1988