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st: RE: Interpreting Poisson regression results with squared term


From   "Martin Weiss" <[email protected]>
To   <[email protected]>
Subject   st: RE: Interpreting Poisson regression results with squared term
Date   Wed, 13 Aug 2008 16:41:32 +0200

Interpretation is facilitated by calling - mfx-. Note, though, that your
case is special in that X1 and X1 squared will move in tandem. See -nl- as a
solution to that...

HTH
Martin

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Antonio Silva
Sent: Wednesday, August 13, 2008 4:14 PM
To: [email protected]
Subject: st: Interpreting Poisson regression results with squared term



Hello All:

I recently posted a question on autocorrelation in Poisson regression, and I
was very happy with the responses I received.

Now I have a question about interpreting my results.

I ran a Poisson regression in which # of groups founded per year was the
dependent variable. My independent variables of interest are X1 and
X1-squared. The results were as follows:

Independent Variables

Constant                       4.655

X1                               .5334**

X1-squared                  -.6439**

X2                               -1.176

X3                               -.0734

** p
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