My generic DCE with neither choice of model for the pilot study has two attributes with two dummy levels, one attribute with three dummy levels and two attributes with three continuous levels. My syntax as follows

- Code: Select all
`design`

;alts=alt1*,alt2*,alt3

;rows=12

;eff=(mnl,d)

;con

;model:

U(alt1)=b0[0.000001]+b1.dummy[0.000001]*format[1,0]+b2.dummy[0.000001]*con_ser[1,0]+b3[-0.000001]*time[10,20,30]+b4.dummy[0.000001|0.000002]*area[1,2,0]+b5[-.000001]*cost[0,50,100]/

U(alt2)=b1*format+b2*con_ser+b3*time+b4*area+b5*cost

$

and my questions are

1. In the manual page 100 "Ngene ignores any constants" I do not know about

this point. please clarify it to me. I include the constant in my syntax that is correct or not?

2. The K includes constant then the number of the row should be 7 rows and

to supporting level balance, thus 12 rows are suitable. If the syntax should not include the constant then the rows are 6. My understanding is correct or not?

Sincerely yours,

Sukunta Muadthong