Search found 5 matches

by markp
Fri May 24, 2019 12:10 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: S-estimate definition
Replies: 1
Views: 51041

S-estimate definition

Hi

I have 2 questions about the S-estimate

1) I just wanted to get confirmation/correction of the definition of the S-estimate reported by Ngene: "the minimum sample size needed to estimate statistically significant parameters values at the 95% level, assuming the prior values are correct."

2) Is ...
by markp
Mon May 20, 2019 2:23 am
Forum: General questions about choice experiments
Topic: Overlapping Attributes
Replies: 1
Views: 5830

Overlapping Attributes

Hello,

I would like prevent no more than 4 attributes from varying between alternatives. I am using the code at (http://choice-metrics.com/forum/viewtopic.php?f=4&t=525)

I've created a set of 10000 choice sets that meet this criteria (https://drive.google.com/file/d ...
by markp
Mon May 20, 2019 2:04 am
Forum: General questions about choice experiments
Topic: Dominance Issues
Replies: 4
Views: 8707

Re: Dominance Issues

Thank you. that worked great.
by markp
Sat May 18, 2019 10:30 pm
Forum: General questions about choice experiments
Topic: Dominance Issues
Replies: 4
Views: 8707

Re: Dominance Issues

Thank you! That fixed the problem.

I am not interested in the main effects and will not be using them in my analysis. Is there a way to run Ngene without them? I haven't had success.
by markp
Sat May 18, 2019 12:07 am
Forum: General questions about choice experiments
Topic: Dominance Issues
Replies: 4
Views: 8707

Dominance Issues

Hi

I am designing a DCE with 9 attributes: 8x5 levels and 1 x 4 levels. 120 rows, no constraints other than dominance.

Ngene is having trouble finding a design without dominance. There is no issue when I remove the priors.

The priors are informed by the literature.

I was hoping for some advice ...