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Re: st: Biprobit


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Biprobit
Date   Mon, 20 Jul 2009 12:11:24 -0400

Also,
I don't think -biprobit- collapses the nonzero values in the same way
as probit.
Compare:

sysuse auto, clear
g y=rep78-1
g y2=y>0 if y<.
probit y mpg weight, nolog
probit y2 mpg weight, nolog
biprobit (foreign=mpg y) (y=headroom foreign), nolog
biprobit (foreign=mpg y2) (y2=headroom foreign), nolog

On Mon, Jul 20, 2009 at 1:01 PM, Richard
Williams<Richard.A.Williams.5@nd.edu> wrote:
> At 10:42 AM 7/20/2009, nigussie Tefera wrote:
>>
>> (a) I have two dependent variables (both dummy variables): one has two
>> categories ( 0 and 1) and the second dependent variable has three categories
>> (0, 1, and 2).  Is it possible to estimate the joint relationship betwees
>> these two dependent variables using the biprobit command?
>
> How is it a dummy variable if it has 3 categories?
>
> I believe categories 1 and 2 are both being treated as though they are 1.
>  If that is what you want, then fine, but otherwise I don't think biprobit
> will act the way you want it to.
>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
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>
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