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I see!!

It didn't immediately click that interaction[0] was standing for the estimated coefficient for the interaction term the same way cost[0] stands for the cost coefficient. Seeing the alternate utility functions written outside of the code really helped.


So just to recap, just like with two ...

Thanks for the help! I ran the code with the interaction term and the D-errors are looking a lot less alarming.

I don't fully understand what the generic interaction term in the code is, though, and I would eventually like to use preliminary data to estimate priors and refine the design.

Why did ...

Hi all,

Apologies, I posted this in Ngene but I think it is a more general stated choice experimental design question. I am making a design where I want to communicate both location and project type, but they are inherently linked. For example, a beach clean-up can only occur on coastal cities ...

Thank you for the help!

Hi all,

I am a very new user of Ngene and choice experiment design generally. When you need one attribute completely dependent on another, should it be introduced as a constraint, or do you simply make a design with one fewer attributes?

Example code is below for a design with:
- 3 2-level ...

Hi everyone,

This might have a very obvious answer, but I have written code that should be searching for a d-optimal choice experiment design with three alternatives, where the third alternative is the status quo option. The number of rows and blocks is given by one of the suggested designs ...