pause on
use ezunem
reg luclms year ez c1-c3
pause
reg luclms year ez c1-c3, robust
pause
use beauty
reg lwage belavg abvavg exper union black female
test belavg abvavg
pause
reg lwage belavg abvavg exper union black female, robust
test belavg abvavg
pause
use smoke
reg cigs cigpric white income
pause
reg cigs cigpric white income, robust