I'm doing a CBC study with Alternative Specific Design (300 respondents, 8 attributes)
Attribute 1 has 2 levels and I applied Prohibitions on every level of Attribute 3 and Attribute 5 if level 2 of Attr. 1 is shown.
Now I'm wondering on how can I calculate SOP in a scenario like this:
Product 1 - Attr1 (Lev 1)+Attr2...+Attr8
Product 2 - Attr1 (Lev 2)+Attr2+Att4+Attr6...+Attr8
While every attribute builds Product 1, in Product 2 Attr3 and Attr5 are missing. If I don't consider those 2 attributes I'm forcing the missing levels to have a zero utility, which I guess it isn't correct
How can I'm manage this situation?
I'm a novice in this field, I beg your pardon
Thank you in advance