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RE: RE: st: What multiple regression model for extreme distributions

From	"Hardy, Dale S" <[email protected]>
To	"[email protected]" <[email protected]>
Subject	RE: RE: st: What multiple regression model for extreme distributions
Date	Tue, 2 Feb 2010 12:28:23 -0600

I am running a logistic mixed model and the performing gradient-based optimization iterations are not concave, so the model is not converging. Can you tell me what can be wrong? How can I fix it? 

The sample size is 117,894 observations for all variables. The model is specified below.


xi:xtmelogit hoscare i.race  i.ses  i.agegroup  sex  i.marry  i.cancer_stage   i.dxyear_cate  i.comorbid || zipcoderesidence: race, intpoints(30) covariance (unstructured) or



Thanks a bunch.


Dale






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References:
- RE: st: What multiple regression model for extreme distributions
  - From: Maarten buis <[email protected]>
- Re: RE: st: What multiple regression model for extreme distributions
  - From: Robert A Yaffee <[email protected]>

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