Dear Richard,
your concern is conceivable, since to my real shame I have misreported two
bits of the code. Sorry for this.
I do hope that everything will work fine this time.
Kind Regards and have a Nice Sunday,
Carlo
---------------------------begin example---------------------------
sysuse auto
save "C:\Documents and
Settings\carlo\Documenti\Statistiche\Stata\Richard_1.dta", replace ttest
mpg, by(foreign) unequal scalar tobs=r(t) sum mpg, mean scalar omean=r(mean)
sum mpg if foreign==0, mean replace mpg = mpg-r(mean) + scalar(omean) if
foreign==0 sum mpg if foreign==1, mean replace mpg = mpg-r(mean) +
scalar(omean) if foreign==1 sort foreign by foreign: sum mpg keep mpg
foreign set seed 1 bootstrap t=r(t), reps(1000) nodots strata(foreign)
saving(C:\Documents and
Settings\carlo\Documenti\Statistiche\Stata\Richard_2.dta, every(1)
replace)verbose : ttest mpg, by(foreign) unequal save "C:\Documents and
Settings\carlo\Documenti\Statistiche\Stata\Richard_1.dta", replace use
"C:\Documents and Settings\carlo\Documenti\Statistiche\Stata\Richard_2.dta",
clear generate indicator =abs(t)>=abs(scalar(tobs)) sum indicator, mean
display "ASLboot="r(mean)
------------------------------end example----------------------------
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