Dear Choice-Metrics team,
Thank very much for developing this software.
I am trying ngene for a pilot study. My basic specification is below which I expect to estimate through a mixed logit. In order to obtain the priors for a Bayesian efficient design, I am first estimating also a Bayesian eff. design based on a pilot with 20 to 30 respondents (2-4 choice sets per respondent).
By the exception of orthogonal design, others design seems to work (fractional, MNL-D-efficient with code effects), however, the syntax bellow is aborted after 10 minutes.
This a shorter syntax, since the initial specification had an status-quo alternative and some constrains to require more realistic choice tasks.
Please I would really appreciate any help.
Best regards,
Andrea
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Design
;alts = alt1*, alt2*, alt3*
;rows = 35
;eff = (mnl,d,mean)
;rseed=12345
;block = 3
;model:
U(alt1) = b1[0.659] + b2[(u,-2,-0.8)]* A[0,1,2,3,4,5] + b3[(u,-0.06,-0.02)]*B[0,1,2,3,4,5] + b4[(u,-1.3,-0.2)]*C[0,1,2]+
b5[(u,-0.8,-0.3)]* D[0,1,2,3,4,5,6,7,8] + b6 * E[1,2,3] + b7 *F[1,2,3,4,5,6] + b8 * G[1,2] + b9*H[1,2,3,4,5] /
U(alt2) = b1+ b2 * A + b3 * B + b4 * C + b5 * D + b6 * E + b7 * F + b8 * G + b9 * H /
U(alt3) = b2+ b2 * A + b3 * B + b4 * C + b5 * D + b6 * E + b7 * F + b8 * G + b9 * H
$