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Re: st: !!NOSIG!! CI for nonlinear estimation

From   Maarten buis <>
Subject   Re: st: !!NOSIG!! CI for nonlinear estimation
Date   Tue, 24 Aug 2010 19:07:35 +0000 (GMT)

--- On Tue, 24/8/10, Kate Rohrbaugh wrote:
> We have Stata 9.2, and would like to figure out 95% CIs for
> predicted values around a beta distribution 
> nl ( _cexpend = ibeta({alpha=1},{beta=1}, _cphase)) 
> where _cexpend is the cumulative expenditure (in percent of
> total) _cphase is the cumulative phase (in percent of total)

Probably easiest is not to cumulate, and model the percentages
using -betafit-, which is downloadable from SSC by typing in

ssc instal betafit

Hope this helps,

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


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