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RE: st: dfbeta for survival time data


From   Ricardo Ovaldia <ovaldia@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: dfbeta for survival time data
Date   Fri, 7 Oct 2005 07:33:50 -0700 (PDT)

I think that this is a new enhancement to Stata 9.
-dfbeta- now works for survival data just like for
-regress-.

I guess is time to upgrade.

Ricardo.

--- Steinar Fossedal <Steinar.Fossedal@nhh.no> wrote:

> Yes, I found the -dfbeta- command, which as far as I
> can tell works only
> after -regress-. I also dug up -ldfbeta- which works
> after logit, but
> none suited for surivial time data. However,
> following links in the
> helpfiles you suggested I found that dfbetas can
> also be calculated
> through -predict-, although only one variable at a
> time. 
> I'm puzzled as to why it doesn't say so in the
> helpfile for -predict- or
> in the chapter concering predict after streg. I'm
> still using stata8
> documentation though, it might be updated in the
> more recent manuals.
> 
> Thanks for your help.
> 
> -Steinar 
> 
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On
> Behalf Of Ricardo
> Ovaldia
> Sent: 7. oktober 2005 14:44
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: dfbeta for survival time data
> 
> --- Steinar Fossedal <Steinar.Fossedal@nhh.no>
> wrote:
> 
> > Hello,
> > I'm fitting a parametric survival time model and
> I'm
> > trying to figure
> > out if any of my observations have a unreasonable
> > large effect on the
> > estimates. I've been looking into the dfbeta
> > commands, but cannot seem
> > to find one for use with survival time data. 
> 
> 
> In Stata 9, according to the manual, the command
> -dfbeta- should work. Type -help dfbeta- to see the
> syntax.
> 
> Ricardo.  
> 
> 
> Ricardo Ovaldia, MS
> Statistician 
> Oklahoma City, OK
> 
> 
> 		
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Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK


	
		
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