Hierarchical multi-logit regression

Hi,

Has anyone tried to code a hierarchical multi-logit regression??? I am in marketing and am doing Conjoint Analysis. I was given some legacy WinBugs codes by my employer, but I am trying to switch to STAN.

Here are some links that you might find helpful:

https://groups.google.com/forum/#!msg/stan-users/ivdRMIeJF04/P36OMgvABAAJ

Best,
Daniel