[R] Vuong test

From: Stéphanie PAYET <spayet.reesfrance_at_wanadoo.fr>
Date: Tue 17 May 2005 - 18:24:29 EST


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,

Stéphanie Payet

REES France
Réseau d'Evaluation en Economie de la Santé 28, rue d'Assas
75006 PARIS
Tél. +33 (0)1 44 39 16 90
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Site Internet : http://www.rees-france.com



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