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Re: st: Marginal effect at each category of dependent variable after ologit using margins command


From   Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Marginal effect at each category of dependent variable after ologit using margins command
Date   Fri, 26 Aug 2011 23:05:26 -0700

Note that by default -margins- computes the average marginal effects,
and -mfx- computes marginal effect at the means of the covariates.
Here are the equivalent commands:

/*******************************/
webuse fullauto, clear
ologit rep77 foreign length mpg
mfx, predict(outcome(1))
ologit rep77 i.foreign length mpg
margins, dydx(*) atmeans predict(outcome(1))
/*******************************/

T

On Fri, Aug 26, 2011 at 9:30 PM, Urmi Bhattacharya <ub3@indiana.edu> wrote:
> Dear Statalisters,
>
> I am using Stata, version 11.2 on Mac. I am estimating the following
> ordered logit
>
> ologit test_math_score child_female age icompl_grade logmpc urban
> father_edu mother_edu  scstobs other_caste muslim num_mixedgrade_s
>
> After that, I am interested in the marginal effect of the explanatory
> variables on the probability of each category of the dependent
> variable test_math_score ( It has 4 categories).
>
> As instructed in Cameron and Trivedi ( Microeconometrics using Stata),
> I do the following:
>
> mfx, predict (outcome(1))
>
> This gives me the marginal effect of the explanatory variables on the
> probability of test_math_score =1
>
> But how do I do the same thing using the margins command?
>
> Any suggestions would be helpful.
>
> Best
>
> Urmi Bhattacharya
> *
> *   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/
>



-- 
Tirthankar Chakravarty
tchakravarty@ucsd.edu
tirthankar.chakravarty@gmail.com

*
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