Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: RE: biprobit model


From   "Gustavo Sanchez" <gsanchez@stata.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: biprobit model
Date   Fri, 4 Feb 2005 09:01:28 -0600

Dear Paloys,

-biprobit- is designed to estimate two probit equations with correlated
disturbances, but not to estimate a simultaneous system. You can even use
-biprobit- if you have a recursive system. See Greene, William H.
"Econometric Analysis". Prentice Hall. Fifth Edition. Section 21.6.6, pages
715-19.

There is a user-written command -ivprob- that that estimates
probit models with endogenous regressors.  Type in

   findit ivprob

to locate, read about, and install it.

Gustavo

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Alfredo Paloyo
Sent: Thursday, February 03, 2005 7:09 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: biprobit model


Dear all,

Is it valid to run -biprobit- on a model described by the following:

y = f(x, a)
x = f(y, a, w)

In other words, the dependent variable of the first equation is among
the independent variables of the second equation, and vice-versa.

The results of the command gives exactly the same P>|z|'s for the common
arguments (i.e., a), with the coefficients having simply the opposite
signs (i.e., same absolute value).  Variables x and y have exactly the
same coefficient and P>|z|.  Standard errors are the same everywhere.

Much thanks.

--
Paloys

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index