Hello, I'm not yet Sawtooth customer but before I become him I would like to clarify one point.
According to CBC/HB user manual the system supports alt-specific design (Car/Bus example, p.76). However, I can't find how I should set that some attributes are alternatives, not just regular, experiment-wide attributes. Respectively, there is no way how to tie alt-specific attributes to their alternatives (except zeros in responses).
As result, the output seems to be just betas (assuming flat design) , while for alt-specific design the output for alternatives should be constants to represent unobservable random effects.
Could you comment this? Is CBC/HB system so smart that able to count zeros in responses to separate alternatives from attributes and correctly ties them to each other?