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Re: st: please help: tobit comparisons


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: please help: tobit comparisons
Date   Wed, 12 Jun 2013 16:07:25 +0200

I can imagine that with some creative constraints you could "trick"
-gsem- to fit a Tobit model in the upcomming Stata 13. If that is
true, then you could estimate both models simultaneously and test the
constraints. However, none of use (outside StataCorp) have access to
Stata 13 yet, so it is hard to verify that intuition.

-- Maarten


On Wed, Jun 12, 2013 at 3:54 PM, Ghazal Zulfiqar <gmzulfiqar@gmail.com> wrote:
> Thanks yes it does! Is there an alternative for suest that can be used in tobit?
>
> Ghazal
>
>
> On Jun 12, 2013, at 9:46 AM, Maarten Buis wrote:
>
>> That error message means exactly what it means: in order for -suest-
>> to work it requires that the models you feed it (in your case -tobit-
>> models) allow -predict- to predict scores. -tobit- does not do so, and
>> can thus not be used in combination with -suest-.
>>
>> Hope this helps,
>> Maarten
>>
>>
>> On Wed, Jun 12, 2013 at 3:23 PM, Ghazal Zulfiqar <gmzulfiqar@gmail.com> wrote:
>>>> Hi statalisters,
>>>>
>>>> I am trying to run 3  tobit models with the same Xs but a different Y and want to compare coefficients. I get an error message when I do
>>>>
>>>> tobit Y1 X1 X2 X3 X4
>>>> est store model1
>>>>
>>>> tobit Y2 X1 X2 X3 X4
>>>> est store model2
>>>>
>>>> suest model1 model2
>>>>
>>>> The message says "unable to generate scores for model model1 suest requires that predict allows the score option"
>>>>
>>>> Can somebody help please?
>>>>
>>>> Thanks,
>>>> Ghazal Zulfiqar
>>>
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>>
>>
>>
>> --
>> ---------------------------------
>> Maarten L. Buis
>> WZB
>> Reichpietschufer 50
>> 10785 Berlin
>> Germany
>>
>> http://www.maartenbuis.nl
>> ---------------------------------
>> *
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>
>
> *
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-- 
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany

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