Search found 8 matches

by Arnaud Blaser
Thu Sep 04, 2014 6:26 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Nested attributes in Ngene + constraints on interactions
Replies: 1
Views: 5798

Nested attributes in Ngene + constraints on interactions

Dear Ngene forum users,
I have a few question regarding a rather cumbersome design we are trying to implement. Let me first briefly describe the attributes at work here;

Ren = dummy [0,1] for presence of renewable energy, no prior assumed (not a very important attribute to understand the problem at ...
by Arnaud Blaser
Thu Sep 04, 2014 6:17 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Choice modeling & stated choice survey design course (Leeds)
Replies: 1
Views: 5967

Re: Choice modeling & stated choice survey design course (Le

I have recently taken such a course taught in Leeds by Prof. Hess, which was amazing. The addition of Prof. Bliemer to the mix promises an even more outstanding course, I definitely recommand it.
by Arnaud Blaser
Sat Aug 02, 2014 12:16 am
Forum: Support for Ngene Desktop (v1.x)
Topic: How reliable is a code giving a single design?
Replies: 4
Views: 9426

Re: How reliable is a code giving a single design?

Thanks for the answer. Yes the team's decision was to include three alternatives instead of two to make the choice more realistic. I think we will go a design based on the federov algo; we realised that we'll need to add further constrain on some attributes' level display hence balance will not be ...
by Arnaud Blaser
Wed Jul 30, 2014 5:24 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: How reliable is a code giving a single design?
Replies: 4
Views: 9426

Re: How reliable is a code giving a single design?

Thanks for the suggestion. I will discuss how badly we need attributes balance with the team.

Providing we decide that we really require 3 alternatives with strict balance, which approach (in your experience) is the most likely to help Ngene; adding more attributes or more levels?
by Arnaud Blaser
Wed Jul 30, 2014 1:16 am
Forum: Support for Ngene Desktop (v1.x)
Topic: How reliable is a code giving a single design?
Replies: 4
Views: 9426

How reliable is a code giving a single design?

Dear Ngene's programers/masters/gods,

We are currently working on implementing a Choice experiment which aims at being very simple; It is a "new heating system" choice task with three alternatives having four attributes (energy savings in %; 10, 20, 30, 40, 50, 60 / net costs savings in monetary ...
by Arnaud Blaser
Fri Jun 27, 2014 6:20 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Pivoted design without status quo alternative
Replies: 4
Views: 10017

Re: Pivoted design without status quo alternative

Excellent. Many thanks for your feedback on this particular case of pivot.
by Arnaud Blaser
Fri Jun 27, 2014 1:30 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Pivoted design without status quo alternative
Replies: 4
Views: 10017

Re: Pivoted design without status quo alternative

Many thanks for your suggestion about the priors. I think we will make use of the planned survey pre-test to estimate them more precisely.

About the pivot; I did read section 8.3 but I am still unsure of how well it applies to our situation. This thing is we do not want to show respondents a ...
by Arnaud Blaser
Thu Jun 26, 2014 6:45 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Pivoted design without status quo alternative
Replies: 4
Views: 10017

Pivoted design without status quo alternative

Dear Ngene forum users,

I am new to both DCE design and Ngene, hence I’ll do my best to avoid silly questions (I DID read the manual, forum, literature and took a course before writting on this forum.)

I am basically trying to design an experiment with three unlabelled alternatives with 4 ...