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AW: AW: st: prgen option quadratic term
From
"Meulemann Max" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
AW: AW: st: prgen option quadratic term
Date
Wed, 7 Nov 2012 10:35:31 +0000
thx, the margins and marginsplot function helped a lot.
Anyways anybody got a idea how I am to interpret my data here: I find a negativ linear term for capitagdp, but if i include a quadratic gdp term, that one turns out to be positiv and significant with a lrtest.
Plotting with marginsplot tells me then that for the linear model the probability to agree with a certain issue decreases whereas it increases with capitagdp for the quadratic model, keeping fixed my other covariates
________________________________________
Von: [email protected] [[email protected]]" im Auftrag von "Maarten Buis [[email protected]]
Gesendet: Dienstag, 6. November 2012 17:10
An: [email protected]
Betreff: Re: AW: st: prgen option quadratic term
Also see: <http://www.maartenbuis.nl/wp/inter_quadr/inter_quadr.html>
-- Maarten
On Tue, Nov 6, 2012 at 4:26 PM, Richard Goldstein
<[email protected]> wrote:
> I am not familiar with prgen
>
> sounds like you want the -margins- command?
>
> On 11/6/12 10:24 AM, Meulemann Max wrote:
>> I d like to get the predicted probabilites as my contionus predicator changes keeping fixed the other ones as it is done in -prgen- only with a quadratic term of that predicator. I do not just want the predicted probabilites.
>>
>> ________________________________________
>> Von: [email protected] [[email protected]]" im Auftrag von "Richard Goldstein [[email protected]]
>> Gesendet: Dienstag, 6. November 2012 16:10
>> An: [email protected]
>> Betreff: Re: st: prgen option quadratic term
>>
>> I don't understand; why don't you start by telling us what is wrong with
>> just using -predict- after your -ologit-? for help on this, start with
>> -h ologit-, then click on "also see" and click on "ologit postestimation"
>>
>> Rich
>>
>> On 11/6/12 10:07 AM, Meulemann Max wrote:
>>> I would like to calculate predicted probabilities in an ordinal model, ologit or oprobit. I am using a continous quadratic term, which makes calculating the predicted probablities more cumbesome. I am using stata 12
>>>
>>> I found an old entry in the statalist archive that proposed oprobpr which does work. I was wondering if another package has been written since 2005.
>>>
>>> oprobpr does work, but some of it its features are a bit irritating like how it saves the predicted probailites in another dataset and so on. The nicest way would be to change prgen and its familiar option in a way that the same feature that works for oprobpr would work for prgen.
>>>
>>> the level options allows oproppr to vary an otherwise fixed covariate with a squared term, which is not possible for the x option of prgen.
>>>
>>> Best regards
>>>
>>> Max
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--
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany
http://www.maartenbuis.nl
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