Estimates from hierarchical longitudinal analysis in stan much less certain than estimates from same model in brms

[Ara_Winter]

Divergent transitions - a primer

This post is outdated, see Runtime warnings and convergence problems for an improved and expanded version So you got: Warning: There were XXXX divergent transitions after warmup. What does it mean? What to do? Divergent transitions are a signal that there is some sort of degeneracy; along with high Rhat/low n_eff and “max treedepth exceeded” they are the basic tools for diagnosing problems with a model. Divergences almost always signal a problem and even a small number of divergences cannot…