What is an Interaction Effect?

1 · John Myles White · Feb. 25, 2017, 6:47 p.m.
Introduction Yesterday, Uri Simonsohn published a blog post called “Interactions in Logit Regressions: Why Positive May Mean Negative”. I love Uri’s blog in general, but I was pretty confused by this latest post. I found it very hard to understand exactly what was being claimed in the absence of formal mathematical definitions of the terms […]...