choice-metrics.com

Prof Bliemer,
I keep learning from you. I had put the U(none)=0. I tried both the rider and driver models with no ASC for the three unlabeled choices, and U(none) = ASC. Works like a charm. I guess putting the ASC for the None option accounts for its choice share better than forcing its Utility=0 ...

Hello,
I used NGENE to design two experiments - one for riders and one for drivers of ride sharing. I have now received some pilot data and had a question on the use of ASC's. In both of my designs, i have 3 unlabeled choices + None, and four attributes.

Hensher, Rose and Green in their text book ...

Hi,
I had another follow up question. I need to export the design to Qualtrics for its conjoint module.
When I look at the design in the Design properties, what i see are the actual levels for the 3 level quantitative variables, and 0,1,2 for the dummy variables.
Any way (besides manually doing it ...

Thanks so much, Michiel.
1. newblocking worked fine, and created the blocks.
2. On the formatting question, I want to use the Redhot style in displaying the Choice Cards. I plan to use Qualtrics to collect the data. In Qualtrics each choice card will become a question, and I can post the HTML code ...

Hello,
I have a few more questions.
1. I am trying to block the saved design into 3 blocks. I did not do this in the original run. I added the following two lines below the model and removed the alg=line in my syntax.
;block=3
;eval=Rider EFF nonlinear 3 alts 15 sets Final.ngd
However the block ...

Thanks. Worked like a charm. Manoj

Hello,
I found a good design and am now trying to format the choice cards. I have 4 attributes, 3 alternative rides and a none choice. The context is choosing a Uber type ride.

In order to create a column for the 'None" choice I did the following. (I am providing these details so other readers can ...

Thank you for the clarity and insightfulness of your response (as usual !!).
Manoj

Thank you for your wonderful insights.
Manoj

Hello Experts,
I have a fundamental question about D efficiency. This question reflects my ignorance and lack of knowledge.

In cases where orthogonal design exist (like the OOD designs in NGENE), the relative efficiency in % is calculated as the ratio of the determinants of the AVC or the X'X ...