total number of observations : 4165
observation : individuals
country : United States
data(Wages)
"male"
and "female"
Baltagi, Badi H. (2013) Econometric Analysis of Panel Data, 5th ed., John Wiley and Sons.
Cornwell, C. and P. Rupert (1988) Efficient estimation with panel data: an empirical comparison of instrumental variables estimators, Journal of Applied Econometrics, 3, pp. 149--155.