I am trying to probe interactions between my predictor (X) and moderator (Z) in stata. where X has a quadratic relationship with the dependent variable.
I have used the margins command to test for slopes at different levels of Z (mean, 1 SD above mean and 1 SD below mean) but not sure if i am on the right track, as my results seem of
margins, dydx(X) at(Z=(-0.4978,-0.0680,0.3618))
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