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Re: st: RE: Propensity Score Matching
From
CARLOS MAGNO SANTOS CLEMENTE <[email protected]>
To
[email protected]
Subject
Re: st: RE: Propensity Score Matching
Date
Sat, 12 May 2012 12:19:00 -0300
Thanks, I'll try again
2012/5/12 Fernando Rios Avila <[email protected]>:
> Hi Carlos
> So one thing you need to know is that there is no RULE to structure
> the model for a propensity score matching setup. And unless one is
> working with your data, its going to be impossible to just give you a
> model that will solve your problem.
> As you may know, propensity score matching (PSM) relies on finding
> observations who are treated and untreated who are similar enough to
> be used as counter factual. The error you reported just means that
> based on -pscore- analysis, after estimating the propensity score and
> matching, some characteristics are sill statistically different.
> What it is suggested is to try a different specification, which
> basically means you have to either include more variables as
> covariates, or include either higher terms (square cubes) and or
> interactions.
> Again, there is no magical rule, you just need to keep trying until
> one of the specification works for you.
> Bests.
> Fernando
> On Sat, May 12, 2012 at 11:01 AM, CARLOS MAGNO SANTOS CLEMENTE
> <[email protected]> wrote:
>> I am using the following command:
>>
>> "pscore binaria pop_2010 pib_09 s_inad_10 analf_10 medi_ind_
>> decl_med_2 decl_med_2 dista_capi, pscore(mypscore) blockid(myblock)
>> comsup level (0.005) logit"
>>
>>
>> binaria = dummy
>> pop_2010 pib_09 s_inad_10 analf_10 medi_ind_ decl_med_2 decl_med_2
>> dista_capi = covariables
>>
>> Could help me in structuring the model?
>>
>> Thank you
>>
>>
>>
>>
>> 2012/5/11 Sarah Edgington <[email protected]>:
>>> 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: [email protected]
>>> [mailto:[email protected]] On Behalf Of CARLOS MAGNO
>>> SANTOS CLEMENTE
>>> Sent: Friday, May 11, 2012 3:41 PM
>>> To: [email protected]
>>> 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
>>>
>>> *
>>> * For searches and help try:
>>> * http://www.stata.com/help.cgi?search
>>> * http://www.stata.com/support/statalist/faq
>>> * http://www.ats.ucla.edu/stat/stata/
>>>
>>>
>>> *
>>> * For searches and help try:
>>> * http://www.stata.com/help.cgi?search
>>> * http://www.stata.com/support/statalist/faq
>>> * http://www.ats.ucla.edu/stat/stata/
>>
>>
>>
>> --
>> Att,
>>
>> Carlos Magno Santos Clemente
>>
>> Geógrafo, Mestrando pela Universidade
>>
>> Estadual de Montes Claros – UNIMONTES
>>
>> Atuação: Geotecnologias
>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/statalist/faq
>> * http://www.ats.ucla.edu/stat/stata/
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
--
Att,
Carlos Magno Santos Clemente
Geógrafo, Mestrando pela Universidade
Estadual de Montes Claros – UNIMONTES
Atuação: Geotecnologias
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/