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Thanks Michael,

This code works well and additionally works when I start adding in added complexities (e.g. priors). When I set a much larger number of rows it is likely that attribute level balance is achieved to some extent in the first design, so I will give this a go too.

Thanks,

Hi Michael,

Thanks for your response. As you can tell I'm new to choice experiment design. That's correct in that the second constraint was the simplest way I could think to satisfy the constraint that all levels are zero for those 4 attributes. I am trying to create a design where respondents are ...

Hi,

I am trying to produce a design that has a number of constraints placed on it and as such I'm finding it a bit hard to produce a model that works. I have two questions really. The first is how the model is affected by using restrictions on it to determine the levels in the design (Model 1 below ...