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st: main effect insignificant, interaction term significant


From   Gáti Annamária <annamaria.gati@tarki-tudok.hu>
To   statalist@hsphsun2.harvard.edu
Subject   st: main effect insignificant, interaction term significant
Date   Wed, 16 Feb 2011 17:13:46 +0100

Dear All,

I know that there is a never ending debate on this, but I am interested in your opinion.

Do (and if so, how do) we interpret interaction terms in the following regression example:

we want to explain whether someone got lung cancer or not and we explain this by gender and smoking.

gender= non sign.
ever smoked= non sign.
gender*smoked= sign

annamaria

***


2011.02.16. 16:17 keltezéssel, Nick Cox írta:
I don't see a histogram. I see markers of different sizes and I don't know what the precise story is. Anyway, you can get some of the way there directly with something like

gen one = 1
label def one 1 "Econ 1 odd"
label val one one
scatter one myvar

or

graph7 myvar, oneway

or

you can look at e.g. -stripplot- (SSC).

Nick
n.j.cox@durham.ac.uk

Rilke Rainer Michael

does anyone know how to do such a graph: www.rainer-rilke.de/1.png ?

It seems to me that this is a scatter plot combined with a histogram. But I do not have a clue about how to implement such a thing in stata.

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