Format
A dataframe containing :
- rns
- residency in the southern states (first observation) ?
- rns80
- same variable for 1980
- mrt
- married (first observation) ?
- mrt80
- same variable for 1980
- smsa
- residency in metropolan areas (first observation) ?
- smsa80
- same variable for 1980
- med
- mother's education in years
- iq
- IQ score
- kww
- score on the ``knowledge of the world of work'' test
- year
- year of the observation
- age
- age (first observation)
- age80
- same variable for 1980
- school
- completed years of schooling (first observation)
- school80
- same variable for 1980
- expr
- experience in years (first observation)
- expr80
- same variable for 1980
- tenure
- tenure in years (first observation)
- tenure80
- same variable for 1980
- lw
- log wage (first observation)
- lw80
- same variable for 1980
Source
Blackburn, M. and Neumark D. (1992) “Unobserved ability, efficiency wages, and interindustry wage differentials”, Quarterly Journal of Economics, 107, 1421-1436.