Shrinkage in Hierarchical models with brms

Hello, first time posting here.

When fitting hierarchical models with brms, what is the default shrinkage model? I assume it is a basic shrinkage model, but I would like to confirm it.

Also, is it possible to fit Hierarchical models with methods such as Dixon-Simon and extended Dixon-Simon?

Thanks!

Hi and welcome,

I don’t remember what the default is but you can play with it. I think the Dixon-Simon are in the beanz package which uses rstan on the back end.

You can of course code up the model in brms and dump out the Stan code and then add in your own Dixon-Simon.