it would be great if somebody could help me understand the 3 following points related to the variable 'none' being reported in Excel Report Summary Results as well as the table of estimated values per level x attribute.
Q1: to what does this variable 'none' refer to ?
it seems that an additional utility value is calculated for this variable "none" (header title), even though this variable is not part of the attributes being tested.
Q2: does it refer to some kind of constant that need to be estimated as well along with utilities per level x attribute.
Q3: in case one is interested in estimating the total utilities associated to a specific combination of levels across attributes, how to deal with this 'none' ? Is it recommended to ignore it ?
Many thanks in advance for your help