Hi,
I'm trying to construct a choice experiment design that isn't a true branded application and I can't seem to find an example on the Internet for it.
I have 3 brands: BrandA, BrandB, BrandC. Each brand has a specific price vector assigned to it. All other product attributes are the same (or will be the same in testing).
Ex: BrandA has prices from $1.5 to $3.5; BrandB has prices from $3.5 to $7; BrandC has prices from $5 to $9. Color options are red, blue, and yellow for all the brands. Size options are 5oz, 6oz, and 7oz for all the brands. Etc.
I tried following a generic experimental design with the following code, but it doesn't give me what I need, and the d-efficiency score is extremely low:
%mktruns (3**2 3 3 3 3 3 3 8);
%mktex(3**8 8, n=72, seed=3);
%mktlab(data=design, int=f1-f2);
%choiceff(data=final, model=class(x1-x9),nsets=72,flags=f1-f2,beta=zero,options=nodups,maxiter=50,seed=3);
If I try to use the branded design, it also gives me something funny.
Any advice would be much appreciated.
Thanks.