I’ve got a MaxDiff exercise where the items being evaluated are 12 different insurance plans. Each plan is somewhat complex (premium, deductible, amount of coverage, etc.), but they are 12 fixed plans with fixed features (so this isn’t a conjoint problem). Because they are complex, I would like respondents to only have to evaluate three at a time.
The hitch is that I’ve got 7 “premium” plans (higher premium and higher coverage) and 5 “minimal” plans (low premium with minimal coverage). At the end of the day, our client would like to pick one or two of the “premium” plans and one or two of the “minimal” plans to go to market with.
In real life, people will be choosing from at least one “premium” and one “minimal” plan so the thinking is that the MaxDiff choice sets should adhere to that constraint as well to avoid cross-effects (i.e. choice of "premium" plans could be influenced by the presence or absence of a "minimal" plan, or vice versa). Is there a way to accomplish this? It doesn’t seem like I’d be able to accomplish this with simple prohibitions because any particular pair of plans would be allowed to be seen together. It’s certain 3-plan sets (all three "premium" or all three "minimal") that would not.