Search found 7 matches

by Linlin
Fri Feb 18, 2022 6:50 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Insignificant parameters in MNL
Replies: 6
Views: 13039

Re: Insignificant parameters in MNL

Many thanks, Prof Bliemer

I believe that design with the priors from different literature has led to so many troubles to the pilot results. So I did the pilot study again, and the code is provided with the sign of parameters:

Design
;alts = alt1*, alt2*,alt3*
;rows = 12
;block = 2
;eff = (mnl, d ...
by Linlin
Fri Feb 18, 2022 9:47 am
Forum: Support for Ngene Desktop (v1.x)
Topic: Insignificant parameters in MNL
Replies: 6
Views: 13039

Re: Insignificant parameters in MNL

Thank you Prof Bliemer, I run the Bayesian MNL using priors from the pilot study, but I got high S estimate.
How many samples shall I collect? There is impossible for me to obtain such a huge number of samples.

Bayesian
S estimate 11310.036(Fixed) 123078107.57(Mean) Std dev.(1736508989) Median ...
by Linlin
Wed Feb 16, 2022 2:52 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Insignificant parameters in MNL
Replies: 6
Views: 13039

Re: Insignificant parameters in MNL

Sorry Prof Bliemer, I forgot to give a quick introduction to the pilot study.

I collected a sample of 185 respondents, but I have designed the pilot survey with priors from different literatures which is totally a huge mistake. But when I realized that it's not a proper way to do so, I've dilivered ...
by Linlin
Wed Feb 16, 2022 12:31 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Insignificant parameters in MNL
Replies: 6
Views: 13039

Insignificant parameters in MNL

Dear Prof Bliemer,

I have several questions related to efficient designs.

First, I have 7 parameters estimated in the pilot survey. However, only 2 of them are statistically significant, which can be used as priors. Why many of them are insignificant?

Second, what values should I assign to the ...
by Linlin
Sun Feb 06, 2022 12:19 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL with priors from different literature or without priors?
Replies: 4
Views: 9383

Re: MNL with priors from different literature or without pri

Thank you , Michiel.
To obtain reliable priors, how many samples we should collect in a prior study?
by Linlin
Fri Feb 04, 2022 11:08 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: MNL with priors from different literature or without priors?
Replies: 4
Views: 9383

MNL with priors from different literature or without priors?

Hi all,

Here are some questions about my first choice experiments and I could use some help!

1) I try to use priors from different literature applied DCM with the efficiency measures(D error:0.986, A error:6.174, B estimate:32.33, S estimate:547.56 ). Is it ok to use priors from different ...