This FAQ gives a description of the *error* messages you can get during a maximum likelihood command and when they are a problem and when they can be ignored:
http://www.stata.com/support/faqs/stat/ml.html
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of [email protected]
Sent: dinsdag 15 maart 2005 17:50
To: [email protected]
Subject: st: non-concave in negative binomial model
Hi, all,
When I tried a series of models for count dependent variable estimation
(nbreg,zinb), there was an indication of "not concave" for the iteration 0
- 1 in "fitting constant-only model". What does this mean? How would
that affect my estimation?
Thanks a lot,
Ying
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