choice-metrics.com

Dear Michiel,

Thank you very much!
I still have doubts.

Design
;alts = choiceA*, choiceB*
;rows = 24
;block = 2
;eff = (mnl,d)
;model:
U(choiceA) = effect[0.0001] * effect[0.85,0.9,0.95] ? effective rates
+ SAR[-0.0001] * SAR[0.1,0.17,0.29] ? adverse reaction rate
+ opinion.dummy[-0.001 ...

Dear

Thanks for your patient answers!

Your previous answer mentioned using ;orth=ood to set duplicates,but the software manual shows that it is the optimal design,how should the overlap be designed in the efficient design?(How the researcher in Ref. used Ngene for D-efficient design while ...

Dear Michiel,

Thanks!

Yes,I read overlap from this literature:Constructing Experimental Designs for Discrete-Choice Experiments:Report of the ISPOR Conjoint Analysis Experimental Design Good Research Practices Task Force.
I also read this from Parental Vaccine Preferences for Their Children in ...

Dear Michiel,

Thank you very much for your answer,it's very beneficial for me.

I have some questions.I read the literature and learned that the D-efficient design questionnaire with Ngene needs to ensure three principles,one of which is the principle of minimum overlap.However,when I run it with ...

Dear Researchers,

Recently,I am designing a DCE pilot study in Ngene.
I want to use Ngene software for D-efficiency design,which generates a total of 12 choice sets,each containing 2 choice options.The purpose of DCE study was to explore physician preference for generic substitution.However,since I ...

Dear Michiel,

Thank you very much for the response,this will help me.

Dear Michiel,

Thank you very much for your patient answer.

I have a general understanding of software runs and pilot study.

The purpose of my study was to explore the factors the influence physicians' generic drug substitution and the extent to which these factors influence.

The two drug are ...

Dear Andrew,

Thanks a lot for your answer.

I modified the syntax to run according to your suggestion.But I found that it would run for a long time and never stopped.What is going on?

Most of my attributes are qualitative. How can i judge whether it is positive utility or negative utility?Such as ...