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st: interpretation of squared term

From   David Bai <>
Subject   st: interpretation of squared term
Date   Thu, 26 Aug 2010 14:54:35 -0400

Dear all,

  I have a question regarding how to interpret squared term:

   Outcome var: addict to drug

  variable                exp(beta)
  Year                      1.05***
  Year squared     0.98***

How shall I interpret the year effect (the year variable and the year squared variable)? Any suggestions would be appreciated very much.
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