average hourly earnings in 1976, $/hour
= ln(wage)
years of education
years potential experience
= ed*ed
= exp*exp
= ed*exp
= 1 if female, = 0 if male
= 1 if male, = 0 if female
industry of employment in 1976
= durman = durable manufacturing
= construc = construction
= ndurman = nondurable manufacturing
= trcommpu = transportation, communication & utilities
= trade = wholesale & retail trades
= services = personal & business services
= profserv = professional services
= sum of all 7 industry dummies