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Re: st: Rosenbaum bounds


From   CARLOS MAGNO SANTOS CLEMENTE <carlosmagno_sc@ig.com.br>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Rosenbaum bounds
Date   Fri, 29 Jun 2012 10:50:31 -0300

Tancks Maarten L. Buis,

I Follow the reference "Sensitivity analysis for
average treatment effects". But the results of my analysis are a bit
confusing. you Could  help with this?

Example

. mhbounds   _tx86_96, gamma(1 (0.25) 4)

Mantel-Haenszel (1959) bounds for variable _tx86_96

Gamma         Q_mh+     Q_mh-     p_mh+     p_mh-
-------------------------------------------------
    1              .         .         .         .
 1.25        -741455         .         1         .
  1.5              .         .         .         .
 1.75        -908093         .         1         .
    2       -1.0e+06         .         1         .
 2.25              .  -1.6e+06         .         1
  2.5       -1.3e+06         .         1         .
 2.75        -980853         .         1         .
    3        -663178         .         1         .
 3.25        -642119  -2.5e+06         1         1
  3.5       -1.7e+06         .         1         .
 3.75              .         .         .         .
    4              .         .         .         .

Gamma : odds of differential assignment due to unobserved factors
Q_mh+ : Mantel-Haenszel statistic (assumption: overestimation of
treatment effect)
Q_mh- : Mantel-Haenszel statistic (assumption: underestimation of
treatment effect)
p_mh+ : significance level (assumption: overestimation of treatment effect)
p_mh- : significance level (assumption: underestimation of treatment effect)



2012/6/29 Maarten Buis <maartenlbuis@gmail.com>:
> On Fri, Jun 29, 2012 at 12:48 AM, CARLOS MAGNO SANTOS CLEMENTE wrote:
>> Doubt,
>>
>> The use "mhbounds" can be considered as "Rosenbaum bounds" in
>> sensitivity analysis?
>>
>> Could someone help me in the interpretation of results?
>
> See:
> Sascha O. Becker and Marco Caliendo (2007) "Sensitivity analysis for
> average treatment effects" The Stata Journal, 7(1):71-83.
> <http://www.stata-journal.com/article.html?article=st0121>
>
> -- Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
>
> http://www.maartenbuis.nl
> --------------------------
> *
> *   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/


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