Anju,
The models are not nested. Since you cannot use the Vuong test with
sampling weights, one way to compare such models is to use an information
criteria, such as the AIC or BIC.
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of anju parthan
> Sent: Wednesday, February 16, 2005 6:55 PM
> To: [email protected]
> Subject: st: Voung test and Sampling weights
>
> Dear All
>
> I have run nbreg and zinb using sampling weights. When
> I run zinb command with voung option I get an error
> message-
>
> option voung not allowed
>
> Is it true that voung test cannot be used with
> sampling weights? If so, how does one compare the
> nested models such as nbreg and zinb or poisson and
> zip?
>
> Thank you for your time.
>
> Anju
>
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