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Great, that makes sense, thanks a lot!

Hello,
I'm designing an unlabeled choice experiment using the m-federov algorithm.
The syntax below has produced a design with perfect attribute balance, each price level present twice per block.
I wanted to ask two questions

1) Is it a problem that the price levels are not evenly spaced? I've ...

Yes, sorry, there was a typo in my post. I meant the same constant for Alt1 and Alt1, like you say.
Thanks a lot for your help, very grateful!
Regards
S

Thanks a lot for the advice, and the quick response!

The constant b1 is 2.07.. (b1=1 for alts1 and alt2)
I had understood from the manual that it's not necessary to add in the constant prior value, as it would be ignored in calculating efficiency measures.

1. Is that the case, or should I also ...

Hi,
I’ve done a pilot study of an unlabeled design on food choice and health labelling, and I’m trying to use the coefficients to get an efficient design with fixed priors. I have a couple of questions I need help with:
Firstly, I’ve realized I made a mistake when designing the pilot… I added an ...

Hello there,
After doing the pre-test we decided on a couple of modifications of the above design about health claims in chicken products:

1. Removed the status quo alterative, and show only two alternatives plus opt-out.
2. Removed the attribute “sustainably produced”.
3. Introduced a constraint ...

Dear Michiel, thanks a lot, that’s very helpful.
The status quo has the same attributes, in fact, but with all binary variables fixed to zero, so I thought I didn’t have to add those.
Your suggestions for how to reduce burden on respondents seem very reasonable, but I was worried that the sample ...

Hello,
This is the first time I design a choice experiment, which we’re due to pilot soon, and I was wondering if the design is fine.
Any feedback would be helpful. The choice experiment is on health and sustainability claims on chicken products, we are planning on doing a small pre-test ...