With my data including a conditional pricing and interaction effect (both on attribute "Productlevel"x"pricelevel" I try to run a very simple WTP scenario.
There is an error indicating: "Extrapolation for attributes with interactions is ot permitted"
Manually I can find a price that equalizes share of choice for an improved product .
a) what could be the problem?
b) is it wise or not to use constraints for HB estimation for price and/ or productlevel here? (it is clear that product-level has a low-mid-high preference)
Thank you