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RE: st: beta regression


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: beta regression
Date   Wed, 26 Oct 2011 15:16:03 +0100

It is. The point is explaining where user-written programs you use come from. 

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

Jet

Sorry for not being clearer. Had thought zoib is under the category of
beta regression.

On Wed, Oct 26, 2011 at 9:30 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:

> The first is a user-written command (-zoib-, SSC). I imagine Maarten will respond if he forgives your not giving him proper credit!
>
> Nick
> n.j.cox@durham.ac.uk
>
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Jet
> Sent: 26 October 2011 14:17
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: beta regression
>
> Thanks to Cam and Nick. Below are the two sets of commands:
>
>  zoib DV predictors, ///
>  zeroinflate (predictors)
>
> Question: For the 0<DV<1 model (first line), do we need to
> exponentiate the estimated coefficients, and interpret the exp(B) as
> changes in odds ratio (of having what value?) or as changes in the
> outcome measured as proportion/ratio?
>
> **postestimation.
> *proportion conditional on 0 < DV < 1
> margins, predict(prcond) at(______)
>
> Question: For the estimated value in the margins in the
> post-estimation function [predict(prcond)], do we interpret the ouptut
> as the predicted proportion or probability?
>

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