pause on
use wage1
gen male=1-female
reg lwage female male
pause
clear
use beauty
gen avg=1-belavg-abvavg
reg lwage belavg avg abvavg
pause
reg lwage belavg  abvavg
pause
reg lwage belavg  abvavg exper expersq union goodhlth black female married
pause
clear
use hprice1
tab bdrms
gen bed2=0
replace bed2=1 if bdrms==2
gen bed3=0
replace bed3=1 if bdrms==3
gen bed4=0
replace bed4=1 if bdrms==4
gen bed5=0
replace bed5=1 if bdrms>=5
reg price bed2 bed3 bed4 bed5
pause
reg price  bed3 bed4 bed5
test bed3=bed4
pause
reg price  bed3 bed4 bed5 lotsize colonial 
test bed3=bed4