Hi @tvwenger, thank you for reopening this. I didn’t have a satisfactory solution for combining multiple likelihoods and then using that for model comparison (say WAIC or LOO)… perhaps something similar to nested model comparison, where you vary the complexity of different models and use Bayes Factors to evaluate preference.
Which package versions are you using here?
I was trying to achieve something like this, where I could programmatically add likelihoods from X different instruments and then perform a similar model comparison as you suggested.