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Dear Professor Bliemer,

Thank you so much!
Regarding 1, I understand.
Regarding 3, I checked the Probabilities for notbuy alternative in Ngene and them in our pilot data. As you said, they are almost the same (0.038 in Ngene and 0.036 in the pilot for average notbuy). Fantastic!!
This probabilities ...

Dear Professor Bliemer,

Thank you so much for answering my questions.

Although further questions are regarding 1, Can I ask you about a way of understanding Table 1 (Bliemer, Ross, and Hess, 2008)?
Now, I have understood that Table 1 shows which better for distributions based on abscissas Rk and ...

Dear Professor Bliemer,

Thank you so much for answering my questions.
I checked your comments and the paper. But, I did not understand the gauss clearly.

So, I would like to ask further questions.

1. The larger R (the number of gauss), the more efficient (decreasing D error): Is that correct ...

Dear Members,

Since I finished the pre-test, I estimated it by the MNL in Nlogit.
-----------------------------------------------------------------------------
NLOGIT
;Lhs=choice
;Choices=alt1,alt2,alt3,notbuy
; model : U(alt1,alt2,alt3)=
B
+KI*KI
+GD*GD
+EI*EI
+TE*TE+NA*NA ? dummies ...

Dear Professor Bliemer,

Thank you for the quick response.

I have misunderstood about zero priors in a D efficient design.
Although I use zero priors in an unlabelled experiment and generate a D-efficient design, I don’t constrain the design to be orthogonal.
So, my D efficient design with zero ...

Dear Professor Bliemer,

Thank you for your reply and forwarding my question to the technical support.

As further findings about this, I could check the OOD button and it showed "undefined" in the D-optimality, not figures.

By the way, I have understood that 0 priors in the D-efficient design is ...

Dear members,

Now I am trying to find a better D-efficient design with 0 prior because of the pilot study.

However, I can't check the OOD button in the properties instead it shows an error message "not enough memory to build OOD covariance matrix" when I run the following code and then put into ...

Dear Professor Bliemer,

Thank you for the quick replay again.

I though a CE design with between and within designs simultaneously.
Although I should have explained it from the begging, I could not do that because I am not familiar to generating a design with Ngene.

Because of your answers, I will ...

Dear Professor Bliemer,

Thank you for your answer quickly.

In your answer 1, I am sorry not to be able to explain my questions enough.
I would explain to analyze between design, not within design.
I read your answers again.
So, I just find that using the same Ngene program can be compare even ...

Dear Members,

Now I am trying to make a better design with Ngene to conduct the surveys for a few groups, A, B, C.
After that, I am going to conduct pilot studies in each group.
Each group has several different characteristics.
So, I would like to compare among groups in the study.

At first, I ...