Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Negative Binomial, lnalpha - standard error missing

From   Andrea Rispoli <>
Subject   st: Negative Binomial, lnalpha - standard error missing
Date   Sat, 15 Feb 2014 15:24:34 +0000

Dear Statalisters,
I have estimated a negative binomial and a poisson model and I have
the following problems:
1. In the nbreg model the standard error for the lnalpha is not
displayed (a dot is displayed instead). Why is this the case?How
should I interpret it? The estimate of lnalpha is -27.

2. The wald statistic is not reported in the nbreg nor in the poisson
model. I have read on previous posts that this may be due to the
presence of dummy variables in the model.
I have about 700 regressors in the model, most of which are dummy
variables over a sample of about 50000 obs. However these dummy
variables are just controls in my model, while my core independent
variables are not dummy.
My understanding is that I can still rely on the robust standard
errors for the individual parameters (core independent variables) in
the model. Is this the case?

Thank you very much in advance.
*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index