WAGE2.DES wage hours IQ KWW educ exper tenure age married black south urban sibs brthord meduc feduc lwage Obs: 935 1. wage monthly earnings 2. hours average weekly hours 3. IQ IQ score 4. KWW knowledge of world work score 5. educ years of education 6. exper years of work experience 7. tenure years with current employer 8. age age in years 9. married =1 if married 10. black =1 if black 11. south =1 if live in south 12. urban =1 if live in SMSA 13. sibs number of siblings 14. brthord birth order 15. meduc mother's education 16. feduc father's education 17. lwage natural log of wage