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st: Test for significance in Interaction model
From
Lukas Borkowski <[email protected]>
To
[email protected]
Subject
st: Test for significance in Interaction model
Date
Sun, 3 Jun 2012 13:04:13 +0200
Dear all,
I am a quite new stata user and I am trying to find a way to check whether the combined effect of my interaction effect is significant.
My model can be simplified as y = b0 + b1x1 + b2x2 + b3x*1x2. x1 is a dummy variable and x2 a variable. I would now like to check whether the combined effect of x2 and x1*x2 for the case of x1=1 is significant. But I am not sure how. I used -test x2 x1*x2- and -testnl _b[x2]*_b[x1*x2] = 0- but I have absolutely no idea if that is correct or not. Could you please help me? Thank you!
#
Lukas Borkowski
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