log using censor,text replace
set linesize 120
global mincellsize 3
global release release
log using $release,replace name(release)
log close release
sysuse nlsw88

stable  grade, contents(mean wage iqr wage max tenure)

keep if race==3
global mincellsize 10
ssummtab, by(union) mean excel replace contvars(age married grade south wage hours tenure) 

global mincellsize 3
regress wage tenure i.grade 
sreg