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RE: st: suest after nl estimation


From   Jan Hohberger <Jan.Hohberger@uts.edu.au>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: suest after nl estimation
Date   Fri, 17 Dec 2010 18:49:17 +1100

Hi Maarten,

Thanks for your suggestion, I will try my luck with ML.

Jan Hohberger

________________________________________
From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] On Behalf Of Maarten buis [maartenbuis@yahoo.co.uk]
Sent: Thursday, 16 December 2010 7:12 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: suest  after nl estimation

--- On Thu, 16/12/10, Jan Hohberger wrote:
> I am estimating two nonlinear models with the -nl-
> command and would like to compare the results afterwards
> with -suest-. However, I get the error message
> "model_1 was estimated with a non-standard vce (gnr)".
> The sues-help states that the "estimators should be
> estimated without vce(robust) or vce(cluster clustvar)
> options". Since I am doing this I am not sure why I get the
> error.

I agree that the error message is somewhat confusing. What
appears to happen is that the default vce is -vce(gnr)-,
which is a non-standard vce. You can read what the defaults
are in -help nl-.

A more serious problem is that the -predict- function after
-nl- does not allow  the prediction of scores. This is a
requirement for -suest-, so that means you cannot use
-suest- after -nl-.

What you could do is rewrite your two problems as a maximum
likelihood problem, estimate them using -ml-, and than use
-suest-.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------




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