Date: Wed, 18 Jun 2008 16:49:29 -0400
Reply-To: "Amy T. Brown" <amara_tabu@YAHOO.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "Amy T. Brown" <amara_tabu@YAHOO.COM>
Subject: Re: Vuong statistic
On Wed, 18 Jun 2008 16:40:02 -0400, Amy T. Brown <amara_tabu@YAHOO.COM>
>I know that Vuong stat can be used to test the fit of Poisson vs. ZIP
>model or Negative Binomial vs. ZINB model. Can it be used to test Negative
>binomial vs. ZIP? They are non-nested models so, I am thinking it should
>work but is that right?
>Thanks in advance!
Never mind, I know that's not right. Vuong compares zero inflated count
models with their non-zero inflated analogs only.