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I’ve been running both conventional and hybrid MXL models with ASC included in my estimations. However, I recently came across a couple of papers with a similar setup to that of mine, published in Ecological Economics and Energy Economics, that omitted ASC from their models. They argued that ASC was ...

Hello everyone,

I’m estimating an MNL and RPL model for a DCE that includes two policy alternatives and a “neither” (opt-out) option per choice set. Each alternative—including the opt-out—is represented as a row in long format.

For the opt-out alternative, I’ve set all attribute values to 0 (both ...

Michiel,

When I used different names for the coefficents, Ngene would run but yield "undefiend."

Thank you for cleaning up my codes and your valuable insights!

-Jamal

Hi Michiel,

Apologies—I was only focused on the coefficient names and overlooked the attribute names. I've refined my code as follows, and while it runs, I suspect it only considers the initial b1 (from the ICT utility fnct.) value and ignores the other b1 values. Should I be concerned about that ...

Following your suggestion, I modified my codes to what follows:

Design
;alts = ICT, BEV, PHEV, FCV ?,none
;rows = 24
;block = 3, minsum
;eff = (mnl,d)
;alg = mfederov

;require:
?ICT.FS = 1,
ICT.RT = 0,
ICT.FSA = 100,

?BEV.FS>1 AND BEV.FS<6,
BEV.MC<8,
BEV.FC<7,

?PHEV.FS>5 AND PHEV ...

Hi Michiel,

Thank you for your prompt response. I followed your advice to the best of my understanding and modified my code accordingly (see below).

Design
;alts = ICT, BEV, PHEV, FCV ?,none
;rows = 24
;block = 3, minsum
;eff = (mnl,d)
;alg = mfederov

;require:
ICT.FS = 1,
ICT.RT = 0 ...

Dear ChoiceMetrics Team,

I’m designing a labeled choice experiment with vehicle-specific constraints and pivot-based cost attributes. Despite multiple attempts, I’m stuck with errors and would appreciate your guidance. I have four different types of vehicles (ICT, BEV, PHEV, & FCH), with each ...

Thank you, as always, for your prompt and helpful response, Michiel!
—Jamal

Dear Ngene Community,

I’m designing a pilot survey for a referendum-style DCE (i.e., Yes, I vote vs. No, I won't vote). The good in question is a public policy. Below is the Ngene syntax I currently have. It runs fine. My main question is whether I am designing the choice set correctly by including ...

Thanks for the tip on using sobol draws when there're more than 5 Bayesian priors. I'm also glad to hear that the Ngene team is actively working on improving the software. For what it's worth, I prefer using NGene over SAS, R, or Stata to create DCE designs.

In your earlier comment, similar to what ...