Friday, March 03, 2006

Re: st: marginal effects for ZINB with interactions and squared terms

Have you read http://www.stata.com/support/faqs/stat/mfx_dydx.html http://www.stata.com/support/faqs/stat/mfx_interact.html yet?

A good place to start.

On 3/3/06, Rullani Francesco <rullani@sssup.it> wrote: > I am estimating a model with interactions: > a+b(x_1)+c(x_2)+d(x_1*x_2) > and squared terms: > e+f(z_1)+g(z_1)^2 > using a zero-inflated negative binomial regression (ZINB) > because of overdispersion and excess of zeros in the data. > Does anyone know how I can obtain marginal effects and > their standard errors, given that mfx and margeff do not > "know" that I have interactions and squared terms?

* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/


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