You can do fairly well here with ridge regression as a poor man's hierarchical model. We've used this library's Bayesian ridge regression to support a geo-prici

You can do fairly well here with ridge regression as a poor man's hierarchical model. We've used this library's Bayesian ridge regression to support a geo-pricing strategy (and it contains the Dirichlet-Multinomial approach as well): https://github.com/bayesianbandits/bayesianbandits https://github.com/bayesianbandits/bayesianbandits