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Re: st: predicting fitted values after ivtobit


From   Alejandro Delafuente <alejandro.delafuente@sant.ox.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: predicting fitted values after ivtobit
Date   Tue, 05 Feb 2008 23:33:15 +0000

Thanks Maarten, is this what you are suggesting then:

ivtobit remittance a b (z = d e), ll(0) first

foreach x in a b z {
        sum `x' if e(sample)
        gen `x'_bis = `x'
        replace `x' = r(mean)
       }
predict remittance_predict, e(0,.) 
twoway (scatter z_predict z, sort


Alejandro

In message <859282.65023.qm@web25001.mail.ukl.yahoo.com> 
statalist@hsphsun2.harvard.edu writes:
> --- Alejandro Delafuente <alejandro.delafuente@sant.ox.ac.uk> wrote:
> > ivtobit remittance hhsize head_age etc (score_index = instruments),
> > ll(0) first
> > 
> > gen z = score_index
> > replace score_index = .2 
> > predict newvarA, e(0,.)  // this would leave the rest of variables   
> >                          // automatically set to their mean
> 
> No, these calls to predict do not set the remaining variables to the
> mean. see -help predict- and the example I sent earlier.
> 
> Leave z as is, and manually replace all other variables with their
> mean, than predict, than plot predicted value against z.
> 
> Hope this helps,
> Maarten
> 
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
> 
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
> 
> +31 20 5986715
> 
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
> 
> 
>       __________________________________________________________
> Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com
> 
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-- 
Alejandro de la Fuente
Department of International Development/QEH
University of Oxford, Mansfield Road, Oxford OX1 3TB
Tel: 01865 281836

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