*
* Example 3.6 from page 93
*
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
*
linreg lwage
# constant educ