Re: st: survival analysis: left censoring/ truncation

[Robert A Yaffee <bob.yaffee@nyu.edu>]

Oliver,
  Stata can usually handle interval truncation and /or
interval censoring.
   Robert

Robert A. Yaffee, Ph.D.
Research Professor
Silver School of Social Work
New York University

Biosketch: http://homepages.nyu.edu/~ray1/Biosketch2009.pdf

CV:  http://homepages.nyu.edu/~ray1/vita.pdf

----- Original Message -----
From: Oliver Eger <oliver.eger@yahoo.de>
Date: Wednesday, May 26, 2010 8:21 am
Subject: st: survival analysis: left censoring/ truncation
To: statalist@hsphsun2.harvard.edu


> Dear Stata users,
> 
> one more question to my survival analysis:
> 
> My study ranges from 1900 till 2000. This is also the enrollment 
> period. Due
> to my definitions, the onset of risk for each company is the year of first
> mentioning in my data source. This means, according to my opinion, 
> that my
> data is neither left censored nor left truncated. But I assume that at 
> least
> some companies existed before 1900, without having exact information about
> this.
> 
> Are there any (technical/ statistical) alternatives to tread this left
> borders of my data instead of doing this by definition?
> 
> Best regards
> Oliver
> 
> ================================================
> Oliver Eger
> Lehrstuhl für VWL - Innovationsökonomik
> Universität Augsburg
> Universität Hohenheim
> Prof. Dr. Horst Hanusch - Prof. Dr. Andreas Pyka
> ================================================
> 
> 
> 
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