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Re: st: Conditional Effects Plot using Dummies


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Conditional Effects Plot using Dummies
Date   Tue, 8 May 2012 18:12:59 +0200

On Tue, May 8, 2012 at 6:00 PM, Lukas Borkowski wrote:
> I work on a dataset with three different subgroups. My model can be simplified as
> y = a_x1 b_x2 c_x3
> and d1, d2 and d3 are my dummies that equal 1 if the observation is part of the corresponding subset. I found a statistically significant interaction effect of d1-3 on x3.
>
> Lets call the interaction term z_d?_x3. I would like to plot the differences in this effect graphically. However, I find it difficult to apply the conditional effects plot on dummy variables.
>
> Any ideas how to plot conditional effects using dummies?

*--------------- begin example ------------------
sysuse nlsw88, clear
glm wage i.race##c.grade c.ttl_exp##c.ttl_exp ///
         i.south, link(log)
margins, at(ttl_exp=13 south=0) over(race grade)
marginsplot, x(grade)
*---------------- end example -------------------
(For more on examples I sent to the Statalist see:
http://www.maartenbuis.nl/example_faq )

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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