[R-sig-ME] Question on Contextual Effects

[Varghese, Jithin Sam]

Hi everyone,

We are working on a project to model 3 separate cross-sectional surveys (i.e., 3 independent samples). Each survey has the following hierarchical data structure:
L3 - states (~20)
L2 -villages  (~X)
L1 - Individuals (~55,000 total)

We are interested in estimating the association between  a contextual variable measured at the state-level (normally distributed) and an outcome measured at the individual-level (dichotomous) in the pooled data set.  Is there any guidance on the advisable number of contextual variables that could be accommodated in the logistic MLM model?

Thanks a lot for the help in advance.

Regards,
Jithin Sam Varghese
Emory University


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