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st: Marginal effects in negative binomial models


From   "Corey Phelps" <cphelps@u.washington.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Marginal effects in negative binomial models
Date   Fri, 2 Mar 2007 20:18:12 -0800

I am trying to calculate marginal effects using the "mfx commute" command
for a xtnbreg model. Because mfx computes marginal effects from the
post-estimated linear predictions, it returns the regresssion betas as
marginal effects. However, I am interested in the marginal effect (e^BX)Bj,
evaluated at the sample means of the covariates. How do I go about obtaining
this? 

Corey Phelps

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