Stata 7.0
I'm having problems getting a bootstrap to work. I'm trying to get standard
errors for the difference between two Cronbach's alpha coefficients. I've
used the example of bootstrapping the ratio of two means from the stata 7
manual (A-G p 171) as a template to produce the following ado file (bef* are
the first 4 variables and aft* the second 4 that I wish to compare):
program define alphatest
version 7.0
if "'1'" == "?" {
global s1 "alphatest"
exit
}
tempname y
alpha bef1 bef2 bef3 bef4
scalar 'y' = r(alpha)
alpha aft1 aft2 aft3 aft4
post '1' ('y' - 'r(alpha)')
end
Every time I run it (bstrap aphatest, reps(100) I get the following error
message:
unexpected end of file
"alphatest ?" returned:
unexpected end of file
I have stored the ado file in my c:/stata/personal folder. Any ideas where
I'm going wrong? Thanks
Patrick
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