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Applying None weight in calculations

Dear colleagues,

Could you explain how do you calculate in SMRT share of preference for None option using None weight? I used the following approaches in Excel:
1. =exp(NoneWeight*NoneUtility)/SumOfExponents
2. =NoneWeight*exp(NoneUtility)/SumOfExponents

I got 100% sum of shares but in both cases I did not get the same numbers as in SMRT.

asked Jun 27, 2017 by Alexey

1 Answer

0 votes
The none weight in SMRT is applied as NoneWeight*exp(NoneUtility), which results in its non-normalized share.  This is done before the SumOfExponents is calculated, which is used to normalize the shares to their 0-100 form.
answered Jun 27, 2017 by Walter Williams Gold Sawtooth Software, Inc. (15,075 points)
Dear Walter,

Many thanks for rapid response.
I will double check my calculations.

Kind regards,