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st: psmatch2


From   Patricia Vera Rojas <pverarojas@yahoo.es>
To   statalist@hsphsun2.harvard.edu
Subject   st: psmatch2
Date   Wed, 31 Aug 2005 07:31:07 +0200 (CEST)

Hi,

I have used "psmatch2" (Matching Method = neighbor) and
I've got:

"There are observations with identical propensity score
values.The sort order of the data could affect your
results.Make sure that the sort order is random before
calling psmatch2"

What can I do to be sure the ATT shown is correct?

Thanks,
Patricia



		
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