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st: -betafit-, -pbeta-, -qbeta- packages on SSC


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: -betafit-, -pbeta-, -qbeta- packages on SSC
Date   Thu, 20 Nov 2003 16:34:43 -0000

Thanks to Kit Baum, various packages 
to do with fitting and plotting (two-parameter) 
beta distributions have been added to or 
revised on SSC. The details follow the 
signature. 

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

betafit (new package, written by Nicholas J. Cox 
and Stephen P. Jenkins) 
=======================

-betafit- fits a two-parameter beta distribution, 
optionally as dependent on covariates. Stata 8 
is required. 

Also included in this package is -beta4-, which 
also fits a two-parameter beta distribution, 
although to a single variable only. That may 
be used in Stata 4 through 7. 

Note: -beta4- was previously called -beta-. 

pbeta (revised, author NJC) 
===========================

-pbeta- produces a probability plot compared with a
two-parameter beta distribution. Fitting is done 
quietly by -betafit-, which should be installed 
separately. These programs all require Stata 8. 

Also included is the previous version, now renamed
as -pbeta4-, which may be used in Stata 4 through 7. 
Estimation may be performed using -beta4-, 
available as part of the -betafit- package. 

qbeta (revised, author NJC) 
===========================

-qbeta- plots the quantiles of a variable against 
the quantiles of a two-parameter beta distribution.  
Fitting is done quietly by -betafit-, which should 
be installed separately. These programs all require 
Stata 8. 

Also included is the previous version, now renamed
as -qbeta4-, which may be used in Stata 4 through 7. 
Estimation may be performed using -beta4-, 
available as part of the -betafit- package. 


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