icymi while you were having a nice life: 20 mins of me explaining fixed and random effects in the context of group confounding, with coded examples of Bayesian implementations. Link cued to start of relevant part https://youtu.be/iwVqiiXYeC4?list=PLDcUM9US4XdPz-KxHM4XHt7uUVGWWVSus&t=3287