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st: RE: crudity


From   "FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <alan.h.feiveson@nasa.gov>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: crudity
Date   Tue, 12 Oct 2004 10:24:27 -0500

Nick- 

Without having seen the code for -betafit- I can make a very educated guess
that mine is the most crude. Does -betafit- allow expreesion of both
parameters (or better, their log transforms) by linear combinations of
covariates?

Al



-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Nick Cox
Sent: Tuesday, October 12, 2004 9:52 AM
To: statalist@hsphsun2.harvard.edu
Subject: crudity


One possibility already on SSC is -betafit- 
(by Stephen Jenkins and myself). I have not 
seen Al's code, so I am not sure who wins
on crudity. 

Also -pbeta-, -qbeta- for some associated graphics. 

Nick 
n.j.cox@durham.ac.uk 

FEIVESON, ALAN
 
> You could also write your own ML routine using a beta 
> distribution. Actually
> I am surprised that Stata doesn't already have some sort of
> "beta-regression" built into it. Actually, I already have a 
> crude version of
> such a program if anyone wants it.
 

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