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st: Countfit and Exposure

From   "Franklin, Frank" <>
To   <>
Subject   st: Countfit and Exposure
Date   Wed, 1 Aug 2007 09:36:31 -0400

Hello Fellow Listeners,

I have a question regarding the use of the command does
the command manage "exposure", is this built in the command or must one
add it manually as you would when running a count model outside of the
countfit command.  If so, what is the best way to do this for the

I have tried many different approaches and I can not seem to get
countfit to replicate the same outcomes as when I compare the PMR, NBRM,
ZIP and ZINB separately.


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