How would you run moderation in statistical software? I know how to run interaction effects.

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How would you run moderation in statistical software? I know how to run interaction effects.

How do you model that. An interaction between age and each of the 4 dummy variables?

There is a methods paper in a epidemiology journal in last 5 years on moderation vs interaction. The distinction is confusing. I think one of the following was an author it: Stephen Cole, Daniel Westreich or Tyler Vander weele.

From reference:

'Interaction is defined in terms of the effects of 2 interventions whereas effect modification is defined in terms of the effect of one intervention varying across strata of a second variable.'

Dr. VanderWeele literally wrote the book on interactions : VanderWeele. T.J. (2015).*Explanation in Causal Inference: Methods for Mediation and Interaction*. Oxford University Press

'Interaction is defined in terms of the effects of 2 interventions whereas effect modification is defined in terms of the effect of one intervention varying across strata of a second variable.'

Dr. VanderWeele literally wrote the book on interactions : VanderWeele. T.J. (2015).

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I never heard of proc plm before