st: main effect insignificant, interaction term significant

[Gáti Annamária <annamaria.gati@tarki-tudok.hu>]

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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