Two-way interactions with the same variable

[Giorgio Piccitto]

Dear users, I would like to know your opinion about the following issue: I have to insert some two-way interactions in my equation, in which the same variable (migrant) is interacted with different variables, one at a time.

Is the correct way of modelling this interaction reg Y i.migrant##i.varA i.migrant##i.varB ?
I mean, by doing so the variable migrant enters only once with its 'main' effect + all its interaction effects with the correspondent interacted variable, right?

Thanks a lot in advance, best, G.

[Rich Goldstein]

not sure I completely understand but I think that if you look at

help fvvarlist

you will see a section on "Applying operators to a group of variables" towards the end and I think that will answer your question

[Carlo Lazzaro]

Giorgio:
try

reg Y i.migrant##(i.varA i.varB)

[Giorgio Piccitto]

Dear Rich, Carlo,
thanks a lot, I solved thanks to your suggestions.

Best, G.