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Re: st: -predict- in a system of equations


From   "Michael Blasnik" <michael.blasnik@verizon.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: -predict- in a system of equations
Date   Sat, 22 May 2004 12:22:47 -0400

How about using -estimates- to store and retrieve the results you want?  I
think that should work across datasets and also provide you with the full
range of predict options.

Michael Blasnik
michael.blasnik@verizon.net


----- Original Message ----- 
From: "R.E. De Hoyos" <redeho2@hotmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Saturday, May 22, 2004 11:06 AM
Subject: Re: st: -predict- in a system of equations


> Michael,
>
> Thanks for your answer.
>
> -predict- wont work because several equations are being estimated. Suppose
I
> estimate -heckman- using data1.dta, then a vector e(b) is created in
> which -predict- is based on. Once a second equation is estimated,
> e.g. -mlogit- a new vector is created, let's say to e(b') and the old one
is
> being lost. When I change to data2.dta I want to be able to predict (or
> score) using both e(b) and e(b'), therefore I needed a way to save these
> vectors, which your suggestion is doing very well.
>
> It would be quite useful to have an option to save all the -predict-
> properties (at least temporary) to use them in an alternative dataset.
> With -matrix score- I can only form linear combinations of the previously
> saved vectors e(b)s and the new Xs, while I might be more interested in
the
> fitted probabilities (as in the case of limited dependant variables eq.)
>
> Thanks again,
>
> Rafa
>


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