I thought it is pretty common to apply mixed / hierarchical linear models? I didn't study statistics but in our field of many problems of modelling biological e

I thought it is pretty common to apply mixed / hierarchical linear models? I didn't study statistics but in our field of many problems of modelling biological effects we would do that. E.g https://www.pymc.io/projects/examples/en/latest/generalized_linear_models/GLM-simpsons-paradox.html https://www.pymc.io/projects/examples/en/latest/generalized_...