I conducted both an ACBC and CBC study for a research project. I am now required to document the D-efficiencies separately for both methods. I used the Sawtooth Software's "Test Design" procedure and found D-efficiencies for ACBC (for each respondent, which is absolutely fine), but no corresponding value for CBC.

For CBC I also included the OLS efficiency test and received efficiency-values for all attribute levels. So my question is: Is it possible to use these efficiency values to calculate a corresponding D-efficiency parameter for CBC? And if not, how might I get this?

I would be very pleased to receive your help!

Thank you very much for your fast response (and sry for my delayed one)!

I already thought that this value might be the D-efficiency number, however, I have trouble to interpret this value. When having relative D-efficiencies it seems plausible that, for example, a modified survey version reaches only 80% of another one's efficiency. But how might I use this value for comparing CBC's efficiency with ACBC's efficiency? Is a comparison of these two different methods only feasible by comparing standard errors?

Thanks again for your help! :-)