*
* Example 2.10 from page 44
*
open data wage1.raw
data(format=free,org=columns) 1 526 wage educ exper tenure nonwhite female $
 married numdep smsa northcen south west construc ndurman trcommpu trade $
 services profserv profocc clerocc servocc lwage expersq tenursq
*
set lwage = log(wage)
*
linreg lwage
# constant educ