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Re: st: Prvalue after mlogit is returning probabilities <0 and >1


From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: Prvalue after mlogit is returning probabilities <0 and >1
Date   Thu, 14 Jan 2010 07:47:43 -0800 (PST)

--- Art Maxwell wrote:
> Why would the predicted confidence interval for outcome 1 exceed 1? And
> why would the confidence interval for the other outcomes include values > that are less than zero?

This is discussed in the article that introduced this command:

Jun Xu and J. Scott Long (2005) "Confidence intervals for predicted 
outcomes in regression models for categorical outcomes". 
The Stata Journal, 5(4):537--559.
http://www.stata-journal.com/article.html?article=st0094

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

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


      

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