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Re: st: interpretation of squared term
From
David Bai <[email protected]>
To
[email protected]
Subject
Re: st: interpretation of squared term
Date
Thu, 26 Aug 2010 15:39:48 -0400
Thank you, Maarten.
I include the squared term because this year variable might be
non-linearly related to the outcome. Is there an easier way to roughly
interpret the year effect? I do not want to go deeper to have an exact
interpretation of the two year variables. E.g., what does a negative
coefficient for a squared term mean? Thank you.
-----Original Message-----
From: Maarten buis <[email protected]>
To: [email protected]
Sent: Thu, Aug 26, 2010 3:28 pm
Subject: Re: st: interpretation of squared term
--- On Thu, 26/8/10, David Bai <[email protected]> wrote:
I have a question regarding how to interpret squared
term:
You can only interpret the time trend graphically. If you
want to have a non-linear trend where you can interpret
the coeficients, you can look at a linear spline, see
-help mkspline-.
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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