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Re: st: marginal after biprobit


From   "Dimitriy V. Masterov" <dvmaster@gmail.com>
To   Statalist <statalist@hsphsun2.harvard.edu>
Subject   Re: st: marginal after biprobit
Date   Wed, 21 Nov 2012 17:03:12 -0800

Ayman,

biprobit is the right command. Austin Nichols has instructions on
calculating the AME here:
www.stata.com/meeting/chicago11/materials/chi11_nichols.pdf.

There are several ways of doing it, some are better than others, but
they tend to produce similar results.

DVM

On Wed, Nov 21, 2012 at 4:47 PM, Ayman Farahat <ayman.farahat@yahoo.com> wrote:
> Hello ;
> I am working on a problem where the dependent variable (iscloed)  is binary and one of the regressors (isgroupon) is binary and endogenous.
> Based on advice i got from the statalist, it was suggested to use a biprobit,
> I ended up using something of the form
>
> biprobit (isclosed = myfailpricerisk lreviewnumber isgroupon) (isgroupon = mygrouponziprisk mygrouponpricerisk lbrate)
>
>
> A couple of questions :
> 1)  Is the biprobit the correct command?
> 2) how do i get the marginal effect of "isgroupon" on "iscolosed" ?
> Thanks
> Ayman
>
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