Sequence in data (variable added by MO)
binary variable equal to 1 if a worker was unionized in 1997 and 0 otherwise
age (in years) of the worker in 1996
binary variable equal to 1 is the worker is black and 0 otherwise
binary variable equal to 1 if the worker is Hispanic and 0 otherwise
binary variable equal to 1 for married worker and 0 otherwise
highest grade attained by worker observed in 1996
log hourly wage of the worker
binary variable equal to 1 for workers that have completed high school and 0 oth
binary variable equal to 1 for workers that have completed college and 0 otherwi