[R] Vuong test

[Seyed Reza Jafarzadeh]

Hi Stéphanie,

The Vuong test can be done in Stata
(http://www.stata.com/support/faqs/stat/vuong.html), but I am also
looking for its code in R. In addition to "zicounts", Dr. Simon
Jackman (http://pscl.stanford.edu/) has provided the code for fitting
the zero-inflated (http://pscl.stanford.edu/zeroinfl.r) and hurdle
(http://pscl.stanford.edu/hurdle.r) count models.

Reza



On 5/17/05, Stéphanie PAYET <spayet.reesfrance at wanadoo.fr> wrote:
> Hi,
> 
> I have two questions. First, I'd like to compare a ZINB model to a negativ
> binomial model with the Vuong test, but I can't find how to performe it from
> the zicount package. Does a programm exist to do it ?
> Second, I'd like to know in which cases we have to use a double hurdle model
> instead of a zero inflated model.
> 
> Many thanks,
> 
> Stéphanie Payet
> 
> REES France
> Réseau d'Evaluation en Economie de la Santé
> 28, rue d'Assas
> 75006 PARIS
> Tél. +33 (0)1 44 39 16 90
> Fax +33 (0)1 44 39 16 92
> Mèl. reesfrance at wanadoo.fr
> Site Internet : http://www.rees-france.com
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>