The Accuracy and Statistical Power of Average Marginal Effects

10 Mar 2017

Below is a Prezi presentation I have prepared for a seminar about the accuracy and statistical power of Average Marginal Effects (AME’s). It presents some simulations that I ran to assess the bias, the statistical power, and the CI coverage of AME’s under various conditions. Although not directly related to using R, the simulations were performed in R and we introduce two packages that allow its use. Note that the two packages (e.g., MarginalMediation and margins) are only available on GitHub at the present.

Ultimately, this is going to lead to Marginal Mediation. We are in the midst of developing a paper to introduce Marginal Mediation and to demonstrate its usefulness in several situations.

I’ll post again once we publish more information on average marginal effects and marginal mediation in the next few months.

As a final note, a great paper presenting the basics of average marginal effects can be found here.