st: Negative Binomial Fixed Effects estimator

[Paulo Guimaraes <guimarap@musc.edu>]

Hello Anirban,

What happens is that the negative binomial with "fixed-effects" is not really a   
fixed effects model like Poisson or OLS. 
That issue is well explained in the following article:

@ARTICLE{Allison2002,
 author = {Paul Allison and Richard Waterman},
 year = 2002,
 title = {Fixed Effects Negative Binomial Regression Models},
 journal = {Sociological Methodology},
 volume = 32,
 pages = {247-265}
}

cheers,

Paulo Guimaraes


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