We haven't seen an option for this in the HB software and there's probably a good reason for this but it would be good to understand why this is. We have a MaxDiff on occasion-based needs when consuming food with a main and boost sample (boosted on certain food categories). The main sample is nat rep so ideally we would apply a weight to also make the main + boost sample nat rep when it comes to the upper model used in the HB estimation.
Many thanks!