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Dear Michiel,
Thank you for your reply.
I still have some doubts, because in some papers, I saw that some people use G-index correlation coefficients matrix to explain the orthogonality. I want to know how to observe and explain the G-index correlation coefficients matrix. There is no relevant ...

Dear Ngene experts:
Thank you very much for your previous reply. Now I still encountered some questions. If I can get your help, I would appreciate it very much.

I am doing an unlabeled D-efficient design, and my questions are:
1. I found that some papers use G Index correlation coefficients matrix ...

Dear Ngene experts, Thanks so much for your detailed explanation for how to calculate WTP. I am really grate for your always and great help. The variable of price in my study was set as continous variable. As you explained, WTP is calculated as a ratio of two coefficients. The price variable was ...

Dear Ngene Experts,
Here is our code for DCE pilot design. After piloting, we analyzed the pilot data and used asclogit in Stata to analyze the pilot data. The stata result is as follows. The question is for the formal design, which is the prior from Stata asclogit result should be used for b0 in U ...

Dear Ngene experts:
Thank you very much for your previous reply. Now I still encountered some questions, If I can get your help, I would appreciate it very much.

This is my syntax:
Design
;alts=alt1*,alt2*,alt3
;rows=24
;block=4
;eff=(mnl,d)
;model:
U(alt1)=b1[-0.0023128]*A[100,250,400,550]+b2 ...

Yes, the B-estimate is a measure of balance. If there is a fully dominant alternative in all choice tasks, then the B-estimate would be 0%, whereas if all alternatives are chosen with equal probabilities then the B-estimate is 100%. Efficient designs (with appropriate non-zero priors) typically ...

But my B-estimate shows 77.748833 in the Ngene, which is not 77.748833% of the percentage system. Can I directly regard 77.748833 as 77.748833%. So if the value of B-estimate in my experiment is not between 70% and 90%, does that mean I have to redo the design?

Dear Ngene expert:
I’m more thankful than I can express for your previous reply.
This is my syntax:
Design
;alts=alt1*,alt2*,alt3
;rows=24
;block=4
;eff=(mnl,d)
;model:
U(alt1)=b1[-0.0016303]*A[100,250,400,550]+b2.effects[0.1388708|0.1552699|0.0522762]*B[3,2,1,0]+b3[0.0003202]*C[1000,2000,3000,4000 ...

Dear Ngene expert:
I’m more thankful than I can express for your previous reply.
This is my syntax:
Design
;alts=alt1*,alt2*,alt3
;rows=24
;block=4
;eff=(mnl,d)
;model:
U(alt1)=b1[-0.0016303]*A[100,250,400,550]+b2.effects[0.1388708|0.1552699|0.0522762]*B[3,2,1,0]+b3[0.0003202]*C[1000,2000,3000,4000 ...

Dear Ngene expert:
Thank you very much for your previous reply.
This is my revised syntax:
Design
;alts=alt1*,alt2*,alt3
;rows=24
;block=4
;eff=(mnl,d)
;model:
U(alt1)=b1.effects[0.001]*A[1,0]+b2.effects[0.003|0.002|0.001]*B[3,2,1,0]+b3.effects[0.001|0.001|0.001]*C[3,2,1,0]+b4[0.001]*D[0,20,40,60 ...