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Thank you very much for this suggestion. As suggested I'll use different parameters with the priors taking into account the fact they are multiplied by lambda, etc. It should make the model more standard.

Thank you for your clarification and apologies for my lack of clarity.
I meant a fixed variable and I corrected the syntax as advised.

However, I still have a problem.
To better understand what was happening, I have simplified the model as followed:


Design
;alts = B, C

;rows = 24
;block = 4 ...

I am trying to develop a design where people have gains/losses in t0, and gains/losses in t3. and other attributes. I created some attributes Y0gain, Y0loss, Y3gain, Y3loss. Given prospect theory (losses have greater disutility), and time preferences, each will have a common basis (the utility of ...

Dear Michiel,

Thank you for this answer and advise

Damien

Dear All,

We are making a bayesian design with 2 alternatives + one status quo. We want to optimize the D-efficiency of a MNL formulation with a Bayesian formulation.

The code reads as follows:

Design
;alts = alt1*, alt2*, sq
;rows = 12
;eff = (mnl,d,mean)
;bdraws = gauss(2)
;model:
U(alt1 ...

Thank you again! Damien

Thank you again for your prompt answer.

Is there a citable source that I can read and cite if needed for this aspect? (I am actually trying to address a reviewer comment who says the opposite and claim that my design is not appropriate for this reason). I was convinced that I was right (and you ...

Dear all,

I have a doubt about the minimum number of rows when doing a blocked design.

Suppose I want to make a design with 10 parameters to be estimated and two alternatives The number of parameter is high because of effects.coded variables.

Then the minimum number of rows is 10/(2-1) = 10 ...

Thank you for your help. Damien

Dear Michiel,

My turn to apologize for late reply, I had switched to another project and I am now back on this one.
Thank you for the nice explanations. It is now working properly.

In fact, I am developing something a bit more complex, and I have 7 attributes (5 continuous all with three levels ...