I have a negative binomial mixed model with counties nested within states. I've read that the formula for the ICC for a negative binomial model is:
When I run
VarCorr(m10), on my random intercept model, I get:
Groups Name Std.Dev.
state (Intercept) 0.22709
Could someone explain how to extract the other information from my
glmer() model so that I can write a function to compute the ICC?
fixef(m10) gets me the intercept term.