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st: RE: Propensity Score Matching


From   "Sarah Edgington" <sedging@ucla.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Propensity Score Matching
Date   Fri, 11 May 2012 17:47:14 -0700

Carlos,
The glib answer is that the message you're getting already tells you what
procedure to take "Try a different specification of the propensity score."
As noted in the Stata FAQ
(http://www.stata.com/support/faqs/res/statalist.html#question) you should
specify what command you're actually using, and where it comes from if it
isn't an official Stata command.  Without that information and at least a
summary of what you're trying to do, it's going to be very difficult to
offer any more specific advice.

Have you read the article "Estimation of average treatment effects based on
propensity scores" by Becker and Ichino, which appears in the Stata Journal
(2002 v2 #4)?  http://www.stata-journal.com/sjpdf.html?articlenum=st0026
I found that discussion helpful when implementing an analysis with
propensity scores. 

Good luck.

-Sarah

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of CARLOS MAGNO
SANTOS CLEMENTE
Sent: Friday, May 11, 2012 3:41 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Propensity Score Matching

PSM the following error occurs.

he balancing property is not satisfied

Try a different specification of the propensity score

What procedure to take?
--
Att,

Carlos Magno Santos Clemente

Geógrafo, Mestrando pela Universidade

Estadual de Montes Claros ? UNIMONTES

Atuação: Geotecnologias

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