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st: marginal after biprobit


From   Ayman Farahat <ayman.farahat@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: marginal after biprobit
Date   Wed, 21 Nov 2012 16:47:59 -0800 (PST)

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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