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Schooling, ability, non pecuniary rewards, socioeconomic background and the lifetime distribution of earnings
Taubman, Paul J., (1973)
Education and lifetime income during demographic transition
Pfeiffer, Friedhelm, (2013)
The non-cognitive returns to class size
Dee, Thomas S., (2008)
Directory of professional and occupational licensing in the United States
Angel, Juvenal Londoño, (1970)