Date: Tue, 4 Jul 2006 05:14:14 -0400
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Jeff Miller <millerjm@UFL.EDU>
Subject: Negative binomial hurdle
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Does anyone know how to run a negative binomial hurdle model?
Since the likelihoods are additive between parts, I would think it to be
just a logit for the zeros and a negative binomial for the positives;
However, these results are diverging from those of other software and really
aren't that sensible.
I'm trying it in NLMIXED.
Has anyone tried this?