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Dear Michiel,

just to let you know that the design you advised me on worked OK, and we have done the survey and analyzed the results - mostly they make a lot of sense :) It took quite some time as we had to sample face-to-face in addition to the web survey. Thank you very much for your help!

Best ...

Dear Michiel,

thank you very much!

Sure, but in case you detect dominant alternatives via post festum inspection because you expect priors are not entirely true, and checking dominance according to priors might not be completely reliable. Can you e.g. remove dominance 'by hand' - switching payment levels between two alternatives ...

Dear Michiel,

after running the code and reviewing the design there seem to be a few dominant alternatives (3 out of 36). The reason I guess are priors, which are to some extent (the sample was just over 50) unreliable in terms that they probably do not represent expected preferences as well as I ...

Thank you! I have tried with this restriction but it states that it could not find a design that meets them - even if I used relaxed ones. Is this a problem with a design? OR it simply cannot for some reason find one. I have also increased the number of rows to 36.

Dear Michiel,

if I may, I would like to ask you as well about choosing the most appropriate Bayesian eff. design from a list of designs, Ngene creates. This might be trivial question, but is it so that you simply go for a design with lowest possible A- C- and S-error and high B-error or do you need ...

Thank you! I have 9 Bayesian par. so I'll go with sobol I guess.

Thank you very much for replying.

Looking at different 'bdraws' algorithms (Halton, Gaus...), are there any (ch. 7.1.5) practical criteria upon which the sim. method can be selected?

Dear Michiel,

just to let you know, we have now completed the pilot study (n=56) I was asking you about (also in this thread) and I was just wondering if there is any 'benchmark' value on either t-ratios for betas or mean/se ratio, beyond which you consider the prior to be simply too unreliable to ...

Dear Michiel,

clear now. Thank you very much for your prompt reply and kind assistance.

Anže