I just came across the assumtion of CBC that the design should be balanced with regard to the levels.
Now I am trying to find the WTP for different product attributes (sustainability labels), which just have two different levels (yes/no) and I added 5 price levels to have a variety regarding WTP. So my design would be (2,2,2,2,2,5).
Is this a problem or a common design for such approaches?
I cannot find help in the literature.
Thanks in advance,