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RE: st: predicted probabilities


From   "Markiewicz, Agnieska" <[email protected]>
To   <[email protected]>
Subject   RE: st: predicted probabilities
Date   Wed, 8 Dec 2004 16:07:21 +0100

Dear Marteen,
Thanks for the command; I'll try to use it. 
Indeed, the confidence interval is enormous also. 

Aga

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of maartenbuis
Sent: Wednesday, December 08, 2004 3:26 PM
To: [email protected]
Subject: Re: st: predicted probabilities

--- "Markiewicz, Agnieska" <Agnieszka.Markiewicz@e...> wrote:
> I would like to calculate the predicted probabilities of different
> outcomes after ologit. Since I have couple of explanatory variables, I
> would like to predict the effect on the probability of an outcome
> keeping the other variables constant. 

The command -prgen- in Scott Long and Jeremy Freese's package spost
(-findit spost-) is what you are looking for. 

> Another question is about the odds ratios after ologit. Some of them
> look reasonable but some reach 5000 what seems to me strange. What can
> be the reason of these results?

The odds ratio is e^(parameter), so the value can easily get very
large. Have you looked at the confidence interval? 

Maarten




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