[R] Multilevel mediated moderation

[Sally Chan]

Dear All,

I want to test a multilevel/cross-level mediated moderation model (Level 1:
IV, DV; and Level 2: Mod, Med). The dataset can be grouped by firm_id and I
use mediate{mediation} with lmer class to do it...

Can anyone suggest if the following models are specified correctly?
I don't know whether a Level 2 variable can be specified in a lmer
model...any idea?
mod.m <- lmer(Med ~ IV*Mod + (IV | firm_id), data, REML=FALSE)
mod.y <- lmer(DV ~ Med*IV*Mod + (IV | firm_id), data, REML=FALSE)

Thanks so much for your help!!!

Best regards,
Sally

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