Search found 7 matches

by dtobin02
Sun May 05, 2024 4:48 am
Forum: General questions about choice experiments
Topic: No-choice dummy WTP interpretation
Replies: 3
Views: 32729

Re: No-choice dummy WTP interpretation

Hello,
I have a question that is similar to this one. I have an unlabeled choice experiment with two alternatives and a "take none" opt out option. We can imagine that this is an experiment to purchase a car (though my experiment is about whether or not a farmer would be willing to plant certain ...
by dtobin02
Fri Nov 03, 2023 11:21 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Re: Designing for MMNL with priors

Hi Michiel -- you were correct that I had not been running the effects analysis correctly. I have since converted the reference level of all categorical variables to take on the values of (-1, 0) and the other levels to take on the values of (1, -1). This is correct?

My NLOGIT MNL code would be ...
by dtobin02
Sat Oct 28, 2023 3:30 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Re: Designing for MMNL with priors

Thanks Michiel! I was misunderstanding effects coding. I will be sure to review the literature, but I think I am all clear now and I have a path forward with our implementation. Thank you again for all of your help!
by dtobin02
Mon Oct 23, 2023 9:55 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Re: Designing for MMNL with priors

Hi Michiel,

Thank you very much for your reply. I am also reluctant to reverse the coefficients but what these priors are saying is that "holding payment total fixed" farmers prefer being paid later rather than earlier for surviving saplings. This is quite hard to understand given that, generally ...
by dtobin02
Fri Oct 20, 2023 10:47 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Re: Designing for MMNL with priors

Dear Michiel -- Thank you again for your help. We have completed our pilot for the first 40 and I have adapted the code you sent by adding the coefficients and standard errors from the MNL model (in NLOGIT).

Based on your response to another recent post, I plan to shrink the non-significant ...
by dtobin02
Sat Sep 16, 2023 10:41 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Re: Designing for MMNL with priors

Thank you so much, Michiel! This perfectly answers my questions!
by dtobin02
Sat Sep 16, 2023 4:09 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Designing for MMNL with priors
Replies: 9
Views: 219070

Designing for MMNL with priors

Hello,

I am a beginner NGENE user who is currently designing a choice experiment to understand farmers' preferences for different types of tree-planting (agroforestry) schemes. We are currently running a pilot (n = 40) with a first design and I hope to use the information we obtain to design a very ...