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| Moderated mediation with count DV |
 
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| w posted on Tuesday, November 27, 2018 - 5:19 pm
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Hi,
I'm trying to test for moderated mediation in the model: X -> M -> Y with a 2nd stage moderator W. X is binary, M and W are continuous, and Y is a count. To get counterfactually defined conditional indirect effects I can use the MODEL INDIRECT command
MODEL INDIRECT:
y MOD m w(low high increment) mw x;
This gives separate indirect effects for every level of w. But is there a way to test for moderated mediation by comparing the indirect effects at just 2 levels of w? Perhaps by bootstrapping the resulting estimates? |
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| You can do it by expressing the 2 indirect effects and their difference using Model Constraint. The approach to a moderated indirect effect for a count Y is discussed in Section 8.2.1 in our RMA book. It is given for when the moderator W is M itself but can be modified for your case where W is not M. |
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