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Re: st: fitting a gompertz curve, not in the context of survival analysis


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: fitting a gompertz curve, not in the context of survival analysis
Date   Fri, 29 May 2009 09:02:22 +0000 (GMT)

--- On Thu, 28/5/09, Dan Waldo wrote:
> I am trying to test whether government revenues as a
> percentage of GDP can be fit over time with a Gompertz curve
> -- especially to determine (if the fit is appropriate) the
> limiting value.
> 
> The help I have found comes in the form of survival
> analysis models, which I have trouble reconciling to the
> model I am trying to fit.
> 
> Is there a Stata add-on that fits Laird's tumor-growth
> variant of the Gompertz? This would be specified as:

-nl- has two Gompertz curves as build in functions.

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


      

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