Search found 15 matches

by rakhee
Tue Jun 18, 2019 6:06 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Ngene not responding
Replies: 5
Views: 12076

Re: Ngene not responding

Thank you for the explanations Michiel.
I'll give it more time to do the calculations for the RP Panel evaluation.
If Ngene/Windows crashes or it's taking too long, as suggested I'll use ;rdraws = gauss(5) and ;rep = 200 instead of the ;bdraws = gauss(3) that I have in my current syntax.

Many ...
by rakhee
Mon Jun 17, 2019 7:04 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Ngene not responding
Replies: 5
Views: 12076

Re: Ngene not responding

Hi Michiel,

Thank you for responding.

I've included my syntax below:
Design
;alts (mnl_model) = GP, RNP, PP
;alts (rppanel_model) = GP, RNP, PP

;rows = 20
;block = 4
;eff = mnl_model(mnl,d,mean)
;bdraws = gauss(3)
;alg = mfederov
;require: GP.X1 = 1

;model (mnl_model):
U(GP) = b1.effects[-0.023 ...
by rakhee
Mon Jun 17, 2019 6:03 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Ngene not responding
Replies: 5
Views: 12076

Ngene not responding

Hi there,

I've run an Ngene syntax where I optimise on an MNL model with 6 Bayesian priors and evaluate for an RP panel model with 1 random parameter with 2 Bayesian priors and 4 other Bayesian priors.
I've let the syntax run for half a day (about 12 hours) on Ngene version 1.2.1 and use the last ...
by rakhee
Fri Jun 14, 2019 4:55 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL design with Bayesian priors in Ngene
Replies: 8
Views: 18839

Re: MNL design with Bayesian priors in Ngene

Hi Michiel,

Thank you for confirming that.

I really appreciate you sharing your knowledge with novices like myself.
It gives me a great starting point as I develop my ability working with stated choice experiments.
This great platform will hopefully enable me to develop the "art" as well as the ...
by rakhee
Fri Jun 14, 2019 2:16 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL design with Bayesian priors in Ngene
Replies: 8
Views: 18839

Re: MNL design with Bayesian priors in Ngene

Hi Michiel,

Thank you so much for the advice and explanations—I really appreciate the help.

I think that I'm almost there, but I’m still a bit confused about calculating the priors correctly due the use and interpretation of the term “stdev”.

I have interpreted that you worked out my priors for ...
by rakhee
Fri Jun 14, 2019 12:46 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL design with Bayesian priors in Ngene
Replies: 8
Views: 18839

Re: MNL design with Bayesian priors in Ngene

Hi Michiel,
So I made the exact same mistake that you guys warned against in the discrete choice course in Sydney i.e. mistaking the Bayesian priors as the random parameters in the mixed logit model syntax.

In your last post, you indicated:
“If you want to have both random parameters and Bayesian ...
by rakhee
Fri Jun 14, 2019 9:07 am
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL design with Bayesian priors in Ngene
Replies: 8
Views: 18839

Re: MNL design with Bayesian priors in Ngene

Dear Michiel,

Thank you very much for reviewing my query and providing advice and a solution to my syntax. Apologies for this basic mistake by me. I have tried the design now too and it works perfectly, thanks.

I’ve just realised that I hadn’t included the syntax to enable me to evaluate for the ...
by rakhee
Thu Jun 13, 2019 1:06 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL design with Bayesian priors in Ngene
Replies: 8
Views: 18839

MNL design with Bayesian priors in Ngene

Dear Ngene team,

I am attempting to design the choice tasks for my stated choice main study.
The pilot study was analysed using a MNL model.
The main study is using the priors generated from the pilot study analysis to design for a MNL model. I will optimise the main study design for the MNL ...
by rakhee
Fri Feb 15, 2019 12:55 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Pilot study with pivot design
Replies: 4
Views: 10727

Re: Pilot study with pivot design

Hi Michiel,

Thank you very much for all your time and advice.

Thanks,
Rakhee.
by rakhee
Thu Feb 14, 2019 10:11 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Pilot study with pivot design
Replies: 4
Views: 10727

Re: Pilot study with pivot design

Hi Michiel,

Thank you very much for reviewing my query and providing advice and a solution to my syntax.

I had thought of the -100% pivot level after posting the query, so I'm pleased that you have confirmed that I'm on the right track with that aspect.
Just checking that when I generate the ...