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RE: st: dfbeta for survival time data


From   "Steinar Fossedal" <Steinar.Fossedal@nhh.no>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: dfbeta for survival time data
Date   Fri, 7 Oct 2005 15:55:45 +0200

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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