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Re: st: Zero Inflated Poisson

From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: Zero Inflated Poisson
Date   Fri, 14 Dec 2007 16:02:02 +0000 (GMT)

--- "francesca.modena" <[email protected]> wrote:
> I run a zero inflated poisson model. The sample is 409 observations,
> with 87 nonzero observations and 322 zero observations. There are 42
> independent variables. <snip> Can you suggest me if 42 parameters are
> too many for my sample?

Nick already answered that Stata will tell you if it is completely
impossible to estimate this model. However, even if Stata gives you
output I would still be very nervous about such a model with this data.
Do you really need all 42 variables?

-- Maarten  

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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