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Syntax is attached here:

Design
;alts = auto, bus, sub, notrvl, chgdest
;rows = 9
;orth = seq2

;model:
U(auto) = ttauto * tt[0,1,2] + a_pcost * pcost[0,1,2] + var * var_auto[0,1,2] /
U(bus) = c_bus + ttbus * tt + b_fare * fare[0,1,2] + bfreq * serfreq[0,1,2] /
U(sub) = c_sub + ttsub * tt + s_fare ...

Hi Andrew, Michiel or Sir/Madam,

I was trying to create an orthogonal design using NGene, but got some outputs unusual. Below is a screenshot of the syntax and output by NGene.
As you may notice that I used orth=seq2 because each alternative has different attribute. The outputs for Auto and Bus ...

Hi all, I found answers for my questions (#1, and #2). But #3 and #4 still remain unresolved. Thanks.

Dear Administrators,

Right now I'm trying to create a design for stated preference questions, and I have a couple of questions about the design that you may help answer. Below is a description of the issue that I’m having:

Background information
In the revealed preference (RP) section, I will ask ...