Hi,
I am designing a discrete choice experiment for five factors (three factors with two levels; and two factors with three levels). I think there should be an orthogonal design for 36 questions at 100% D-efficiency but I just cannot find a way to do so. I ran the following:
%MktRuns(2 2 3 2 3)
%MktEx (2 2 3 2 3, n=72)
%choiceff(data=design, model=class(x1-x5/sta),
nsets=36, flags=2, maxiter=100, seed=121, options=relative, beta=zero)
However, the design I am getting is not orthogonal, and the max D-efficiency design I got is around 85. Is there something I am missing for the steps to design the choice experiments? Thank you very much for your time and input in advance.
Regards,
Kim