[R] restricted glm estimation

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Jun 23 08:32:16 CEST 2004

On Tue, 22 Jun 2004, B. Dan Wood wrote:

> Is there a package or procedure that implements restricted estimation using
> glm? I need to do a poisson regression under glm with one parameter fixed at
> a specific value. Just at a glance, I don't see a way to do it using glm.

Use offset(), which allows you to enter a term with coefficient fixed at 
one (and hence at any value by including the fixed value in the offset).

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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