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RE: st: log of zero


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: log of zero
Date   Wed, 2 Jul 2008 12:30:03 +0100 (BST)

--- Viktor Slavtchev <slavtchev@econ.mpg.de> wrote:
> > > I want to estimate production function in logs in order to
> > > interpret the coefficients in terms of elasticities. one of the
> > > RHS variables has a lot of zero value. 

--- maarten Buis wrote:
> > I think you are refering to using -glm- with the log link

--- Nick Cox <n.j.cox@durham.ac.uk> wrote:
> As I understand it, -glm, link(log)-, although otherwise white magic
> of the best Dumbledore kind, can do nothing to help with zeros in a
> predictor that you want to log. 

Good point, I missed the reference to the RHS variables.

-- 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/
-----------------------------------------


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