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st: marginal effects of interacting variables

From   Mehmet Beceren <[email protected]>
To   [email protected]
Subject   st: marginal effects of interacting variables
Date   Fri, 03 Oct 2003 10:19:06 -0400

I have a regression with interacting variables in the following form: Y = a + bX1 + cX2 + zX1X2
And I would like to estimate the total marginal effect (total derivative) of X1 and the standard error of the total derivative.
The derivative at the mean of the variables will be b + z* meanX1*meanX2

Does anyone know a quick command to get the SE of the total derivative after such a regression? Manual calculations become harder as the number of interacting variables increase.


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