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Ok I think I understand now - no need to reply to my prior post.

In estimation, the model determines the numeric disutility of an extra unit of cost, because this will show up in choice probabilities, as a factor independent of the other choice experiment variables. That is how cost gets its own ...

P.S.
As a followup to my last post, I just wanted to mention that i do understand that the prior on cost is related to the marginal utility of income, and therefore there is a "correct" value for the prior. However I was thinking that this wouldn't change an efficient design, so long as the cost ...

Thanks Michiel for the feedback, we appreciate it!

Something I am not grasping is why scaling all of the priors up or down by the same factor would matter. Conceptually I am thinking that I am setting my medium cost level offered to approximately balance out the maximum policy offered. If the prior ...

Hello, thank you for offering this forum. It has been some time since I have used Ngene and on behalf of my study team I wanted to post a question on a national survey we are working on. There are 3 attributes besides cost, the 1st is a negative on utility with 3 levels, the 2nd is a positive on ...

Hello Michiel,

Thanks for the guidance on evaluating designs - unfortunately we have still not been able to get this to work. NGENE does output something, however in the output window the Mean Bayesian MNL D-Error comes up as "Undefined". This is the outcome for each of the manually adjusted ...

Hello Michiel,

Thanks for your response!

We have tried the "eval" command, thanks for pointing us in this direction and apologies for not previously noticing this option in the NGENE manual. We did have some follow-up questions after trying it:

* It does not seem like you can edit a design file ...

Hello Michiel,

Thank you so much for your extremely helpful reply, and apologies for this late follow-up. There are a few things that we wanted to ask for clarification on as we move forward with our study.

1) Yes, you are correct that our model was not identifiable as written. There was a mistake ...

Hello NGENE Users,

I am working with a team on a stated preference survey featuring salmon recovery. We have 200+ choice situation responses from a pilot, and are refining the design in an effort to improve the coefficient estimates from the pending full survey mailing. We expect to have several ...