Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Missing Log-Likelihood test of alpha in nbreg

Subject   st: Missing Log-Likelihood test of alpha in nbreg
Date   Sun, 16 Feb 2003 01:54:00 -0600 (CST)

Hello all:

I am running some negative binomial poisson models, but Stata is not providing 
me with the log-likelihood ratio test of alpha. Other analysis of the data, 
including poisson models, suggests there is overdispersion. It is possible that 
a zero-inflated negative binomial model might be more appropriate. However, I 
would imagine that this would not prevent Stata from calculating the alpha test.

I am using Intercooled Stata 6.0, and the models do include pweights and 
clustering. If anyone might know why I cannot get the alpha test in my output, 
I would greatly appreciate the assistance. I am a relative novice to Stata, but 
the manuals and online help have not provided an answer for this situation.

Robert J. Fornango
University of Missouri-St. Louis
*   For searches and help try:

© Copyright 1996–2019 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index