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Re: st: RE: Generalized Gamma

From   "Lori M. Ward" <[email protected]>
To   [email protected]
Subject   Re: st: RE: Generalized Gamma
Date   Sat, 23 Jan 2010 00:12:26 +0000

Thank you for the information. I was wondering about the censoring. That helps.

Thank you.
------Original Message------
From: Verkuilen, Jay
Sender: [email protected]
To: '[email protected]'
ReplyTo: [email protected]
Subject: st: RE: Generalized Gamma
Sent: Jan 22, 2010 5:53 PM

Lori M. Ward wrote:

>>I am interested in estimating a two part generalized gamma model. My response 
variable is cost, and I hace several predictor variables.  I am interested in 
the two part generalized gamma distribution because I have been told about its 
incorporation of heterogeneity, and that STATA could automatically generate 
initial parameter estimates for such a model. Is anyone familiar with running such a model in STATA?<<

Same answer as we gave you to the previous question about something similar:

     -help streg-

-streg- will ordinarily assume you have censored data. If you don't have censored data, just make a variable that's the censoring indicator that never indicates a censored observation and it will drive on just fine. Whether the generalized gamma model is what you need, well that's a different question, but -streg- has a lot of other distributions suitable for a variable like cost. 

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Lori M. Ward

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