Can anyone help and explain? Or post a link to where the formula is explained?

Thanks a lot!

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Can anyone help and explain? Or post a link to where the formula is explained?

Thanks a lot!

0 votes

Make sure you are using the raw HB utilities (not the rescaled, zero-centered diffs).

Sum the total utility for each of the alternatives in the simulator. Exponentiate the sums. (That means use =exp(U1), where U1 is the total utility for alternative 1, etc.

Normalize those exponentiated sums to sum to 100% within respondent.

Average those results across people.

If you are still having problems, you can email your spreadsheet to our technical support group and let them have a look to see where your mistake is.

My best guess is you are trying to use zero-centered diffs rescaled utilities rather than the raw utilities.

Sum the total utility for each of the alternatives in the simulator. Exponentiate the sums. (That means use =exp(U1), where U1 is the total utility for alternative 1, etc.

Normalize those exponentiated sums to sum to 100% within respondent.

Average those results across people.

If you are still having problems, you can email your spreadsheet to our technical support group and let them have a look to see where your mistake is.

My best guess is you are trying to use zero-centered diffs rescaled utilities rather than the raw utilities.

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If you are using Discover-CBC software, the market simulator is set to Randomized First Choice and you cannot change it. Thus, you would not be able to reproduce the Randomized First Choice results using the logit (Share of Preference) math steps.