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RE: st: Model for Poisson-shaped distribution but with non-count data
From
"Silcocks, Paul" <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
RE: st: Model for Poisson-shaped distribution but with non-count data
Date
Tue, 6 Dec 2011 08:46:14 +0000
How about using gllamm? You can have a random intercept, identity link and a gamma family
Paul Silcocks BM BCh, MSc , FRCPath, FFPH, CStat
Senior statistician,
Cancer Research UK Liverpool Cancer Trials Unit
University of Liverpool
Block C Waterhouse Building
1-3 Brownlow Street
L69 3GL
email: [email protected]
tel: 0151 7948802
mob: 0794 983 2775
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Millar
Sent: 06 December 2011 05:10
To: [email protected]
Subject: Re: st: Model for Poisson-shaped distribution but with non-count data
Owen,
An appropriate distribution would be gamma, but that is only available
for panel data. Anyone up for creating a new MLE command?
- Paul
On Mon, Dec 5, 2011 at 6:34 PM, Owen Gallupe <[email protected]> wrote:
> Hello,
>
> Does anyone know what type of regression model I should use? I've been
> searching and have not been able to find a modeling approach designed
> to meet the distributional properties of a variable I am hoping to
> analyse.
>
> The dependent variable has what looks like a Poisson distribution, but
> with non-count data. About 28% of the sample scores somewhere between
> 0 and 1. The highest value is 182.6. Skew = 2.256; kurtosis = 10.002.
> N=2776.
>
> I have tried bootstrapped linear regressions and linear regressions
> after employing a normalizing transformation using lnskew0 (though the
> normalization is not perfect and results in a bimodal residual
> distribution).
>
> One further complication is that I need to include random intercepts.
>
> If anyone could help, it would be very much appreciated.
>
> Regards,
>
> Owen Gallupe
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--
- Paul Millar, Ph.D.
School of Criminology and Criminal Justice
Nipissing University
North Bay, Ontario, Canada
www.paulmillar.ca
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