choice-metrics.com

Perfect. Since I have a reasonable sample size (n=1000-2000), I will assume that the larger standard errors is not a significant issue.

Thank you very much again for your orientations!

Rafael

Dear Michiel,

Thank you very much for the clarifications and suggestions. I’ve updated the design based on your feedback, including the constant and adjustments to the candidate set size. The updated code is as follows:

Design
;alts = Alt1*, Alt2*, Alt3*, Optout
;rows = 80
;block = 10
;eff ...

Dear Ngene moderators,

I’m using NGENE to develop an efficient design aimed at estimating the brand equity of various consumer goods brands, employing a mixed logit model in WTP space. I have two questions regarding the potential impact of brand-specific priors on WTP estimates.

First, I’d like to ...

Dear Michiel,

Thank you very much for providing the NGENE script and your valuable guidance.

I would like to revisit the preference ordering for the 'brand' attribute levels, as there seems to be a point of confusion on my part.

I understand that in the typical dummy coding sequence in NGENE, the ...

Dear Professors,

I am embarking on a discrete choice experiment focusing on brand choice for a fast-moving consumer good. It employs an unlabeled efficient design, incorporating three attributes: brand, price, and taste. The design features three alternatives alongside an opt-out option, and I've ...

Dear Professor,

How should I treat a opt-out alternative (which is always present in the choice tasks) in the spreadsheets you have shared? Since it has no attribute, should I use the spreadsheet with the number of alternatives minus the opt-out?

For example, if my choice set has 5 alternatives ...

Hello Michiel,

I am still working in the design of this research.

I have been considering different model specifications and I would like to try a design whithin design with some interactions.

In sum, I have a scenario variable (APPL), coded as dummy, and need to interact it with the ASC as well ...

Dear Michiel,

Thank you very much for your reply.

I think your points are clear for me. I will go further with them.

One last question: is there any special recommendation for the number of alternatives per choice task in partial choice profile designs? More specifically,

. Supposing that I ...

Dear Michiel,

I am facing some issues to generate a design whithin design. I have a choice behavior to model in which buyers choose among alternatives sequentially. It is a treatment choice context, where persons usually choose combos of products for a sequential application. For example, one ...

Thank you very much, Professor!