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Hi Michiel,

yes, I looked at the syntax and now I understand the problem with the dummy coding! Thank you!


design
;alts = altA, altB, status quo
;rows = 9
;eff = (mnl, d)
;cond:
if(altA.pa = 0, altB.pa = [1,2]),
if(altA.pa = 1, altB.pa = [0,2]),
if(altA.pa = 2, altB.pa = [0,1]),
if(altA.an = 0 ...

Hi Michiel,

yes, I looked at the syntax and now I understand the problem with the dummy coding! Thank you!


design
;alts = altA, altB, status quo
;rows = 9
;eff = (mnl, d)
;cond:
if(altA.pa = 0, altB.pa = [1,2]),
if(altA.pa = 1, altB.pa = [0,2]),
if(altA.pa = 2, altB.pa = [0,1]),
if(altA.an = 0 ...

Thank you Michiel for the prompt response and explanation.
I have integrated your comments into the Synatx but unfortunately I still get the error:
Error: The 'model' property contains a prior that has dummy or effects coding without an appropriate suffix. 'b1'

The attributes and levels of my two ...

Dear Mr. Bliemer,

my base level is 2. Thats because I used:

b1.dummy[-0.07163|0.25366] * pa_1[0,1,2]

I didn't use the dummy coding for all attributes because:

"In order to use categorical variables with more than two variables in the regression model, dummy variables must be formed. Each ...

Hello,

i need help building my syntax in ngene. I do a choice experiment with 3 alternatives (AltA, AltB, Status quo) and an effizient design. Each alternative (AltA and AltB) is described by the same attributes and levels. I've already done a pretest to get the priors and want to integrate them ...