Shehzad,
Just to be sure: Are you using an up-to-date version of -glcurve- (from the SSC archive)?
. which glcurve
*! 3.2.0 Philippe Van Kerm - Stephen P. Jenkins 07 February 2007
Philippe
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Shehzad Ali
Sent: Thursday, June 19, 2008 7:02 PM
To: [email protected]
Subject: st: different result everytime - something strange
Hi listers,
I have encountered a funny problem, which maybe due to something wrong with
my codes or with stata. I am trying to calculate concentration index using
convenient regression method but everytime I run my do file, I get
different results using exactly the same data. I am sure someone can help.
Here is what I am doing:
glcurve y [aw=weight], pvar(rank) replace nograph
qui sum x [fw=weight]
scalar mean=r(mean)
qui sum rank [fw=weight]
sca var_rank=r(Var)
gen lhs=2*var_rank*(x/mean)
regr lhs rank [pw=weight], cluster(commune)
sca CI=_b[rank]
display "concentration index", CI
Any help would be appreciated.
Shehzad
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