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I've just tried the following design in Ngene, which gives me a design that has equal 'none' attribute levels in both alternatives, BUT only gives me one design and says S-error and MNL error are "Undefined".

Design
;alts = alt1*, alt2*
;rows = 24
;block = 6
;eff = (mnl, d)

;alg = mfederov ...

Hello,

I have the following design below in NGene. The objective is to understand what level of information precision people prefer on 7 public transport information attributes. The precision levels are exact=1, estimate=2, or none (no information given)=100. (For example you could have exact ...

Thanks so much! This helped solve a lot of headaches.

Just another quick question - for simplicity sake I have been using a multinomial logit model for this design, but after I do a pilot study (~100 participants) I want to update the design with a better understanding of the parameter priors, and ...

To create realistic choice sets with trade-offs between the alternatives, I need to introduce a few design constraints, which I am unclear how to do in this particular case.

For context:
I would like to understand which information types transit users most need to plan a journey. There are 8 ...

Many many thanks!

I'm just starting out with NGene, so please forgive me if this has been asked, but is it possible to specify different priors for a dummy variable, or for effects coding?

For context:
I would like to understand which information types transit users most need to plan a journey. For simplicity sake ...