Search found 17 matches

by Sanchez
Thu Apr 26, 2012 8:37 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Referencing the Ngene Manual
Replies: 2
Views: 10570

Referencing the Ngene Manual

Good day.
If we would like to reference the Ngene manual in a paper, how would you prefer this be done?
Kind regards.
by Sanchez
Mon Apr 02, 2012 11:59 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

Thank you Michiel.
That's exactly what I needed to know :)
Have a great day.
by Sanchez
Mon Apr 02, 2012 10:00 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

Hello Michiel.

You're right - the design does run with setting the number of candidates to 100.
The problem in our case is indeed that the status quo alternative is the base (all the levels of the status quo do not vary with the alternatives presented in the choices).... while this may not be ideal ...
by Sanchez
Fri Mar 30, 2012 12:17 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

Yes, new version and exactly the same syntax.
Tried it on two computers (which are both very good computers), but it doesn't seem to run without crashing the program....
I did get it to run once yesterday... but since then not again.
I tried to adjust the code to specify
alt2.size>0
also, because ...
by Sanchez
Thu Mar 29, 2012 1:07 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

Hi Michiel.
Looks like a great design - would love to try it, but the program crashes every time I try to run it. I've tried on 2 computers now - no success.
Any tips?
Thanks again!
by Sanchez
Wed Mar 28, 2012 6:37 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

Hi Michiel.

Thank you so much for that quick reply.
I was trying what you mentioned, but I also wanted to incorporate the effects-coded nature that the final model I use will take - and I noticed that doesn't work if I specify the status quo the way you showed me. The other issue with our status ...
by Sanchez
Tue Mar 27, 2012 11:03 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Re: Dominated alternatives.

I have tried to simplify the problem by taking the uncertainty of the priors out as well as reduce dominance by starring the alternatives as in the following code:

Design
;alts(m1)= alt1*,alt2*,sq
;rows=24
;block=3
;eff= M1(mnl,d)
;model(m1):
U(alt1) = b2[0.099]*dist[5,8,12,18] + b3[-0.0028]*size ...
by Sanchez
Tue Mar 27, 2012 3:45 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Dominated alternatives.
Replies: 11
Views: 35494

Dominated alternatives.

Hello.
I am trying to create a choice experiment with 5 attributes in which we try to value the WTP for different elements of a renewable energy product.
The attributes have the following levels: distance (4), size (3), carbon reduced (4), jobs created (4), fee added monthly to electricity bill (8 ...
by Sanchez
Wed Jan 25, 2012 12:37 am
Forum: Support for Ngene Desktop (v1.x)
Topic: conditions and rejections
Replies: 5
Views: 13302

Re: conditions and rejections

Hi Andrew.
I tried what you suggested, but even in the last 50 designs, there is always at least one case where the status quo option is reflected in one of the alternatives.
Is there no other way to do this? Do you have any other ideas?
Thanks a lot for your assistance - much appreciated.
by Sanchez
Fri Jan 20, 2012 1:23 am
Forum: Support for Ngene Desktop (v1.x)
Topic: conditions and rejections
Replies: 5
Views: 13302

Re: conditions and rejections

Hi John.

Sure! Thanks for getting to this so quickly. Below is the code without the ;reject: included. The last condition already addressed the issue where an alternative had the same levels as the status quo, but a better environmental condition and so clearly dominated the status quo.

Thanks ...