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Re: st: calculating alphas with imputed data


From   daniel klein <klein.daniel.81@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: calculating alphas with imputed data
Date   Thu, 9 Jun 2011 20:24:30 +0200

I thought it may be worth a shot, however it is not surprising that
-alpha- does not work with -mi estimate-. I guess Stata Corp.
documented _every_ official command, that may be used, as the
documentation of Stata is usually very detailed.

Following the link I provided, and given that Cronbach's alpha can be
regarded as "just a point estimate" where Rubin's rules may be applied
without correction (maybe someone can comment on this), a starting
point might be

loc M 5 //replace the number of imputed datasets here
sca alpha = 0
mi xeq 1/`M' : alpha bs3c1 bs3c3 bs3c4 bs3c6 bs3c7 bs3c8 bs3c9 if
knowlmle<82.6 ; sca alpha = alpha + r(alpha)
sca alpha = alpha/`M'

di "{txt}alpha : {res}" alpha

(I did not run the above, since I have no copy of Stata on the Laptop
I am writing this message)

Best
Daniel
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