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Comparing CBC and MXD utilities possible?

Hello everyone,

within my current study I have a CBC and MXD part. Some attributes/levels of the CBC are reflected in the MXD items.

Now my question is, if I can somehow directly compare the results from both methods, using the average importance/utilities/etc.?

Thank you very much in advance!

Regards
Philipp
asked Feb 20 by Philipp (235 points)

1 Answer

+1 vote
 
Best answer
The challenge is that the scale factor (the magnitude of the utilities) in choice experiments (whether CBC or MaxDiff) is inversely related to the response error.  And, response error is generally much lower in MaxDiff compared to CBC, leading to utilities with much larger magnitudes in MaxDiff than CBC.

So, you cannot just compare utilities directly from a MaxDiff to a separate CBC.  If most of the levels involved in the MaxDiff are also involved in the CBC, then it might be possible to do a fancy data fusion where the two sets of data are stacked (and recoded to have a common X matrix).  That takes some work!
answered Feb 20 by Bryan Orme Platinum Sawtooth Software, Inc. (174,440 points)
selected Mar 13 by Philipp
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