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Re: st: fitting a gompertz curve, not in the context of survival analysis
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From |
Maarten buis <[email protected]> |
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To |
[email protected] |
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Subject |
Re: st: fitting a gompertz curve, not in the context of survival analysis |
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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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