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st: poisson exposure problem

From   "Philip Ender" <>
Subject   st: poisson exposure problem
Date   Thu, 27 Mar 2008 13:19:16 -0700

A student comes in with a poisson model.  The response variable is the
number of seeds of a certain species.  There is an exposure variable
which is the total seeds of all species.  The problem is that there
are six exposure values of zero.  There are three other predictor
variables and 72 total observations.  Is there any way of dealing with
this problem other than dropping those six values?  Any suggestions?

Phil Ender
Statistical Consulting Group
UCLA Academic Technology Services
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