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Dear Michiel,

I am building MNL models on my pilot data to update the priors for efficient design.

At this stage, I have constructed simple MNL models that only include the experiment attributes appearing in the DCEs and do not consider interactions. As a result, the model performance is not ...

Dear Michiel,


Thank you for all your support. Our study has now been distributed for the pilot phase.

Since we are using pivoted attribute levels, we aim to apply the 'mean' value for the experimental design. Additionally, we use best and second-best choices to obtain a complete ranking of ...

Hi Michiel,

The alternative "Car" is the Status-quo in this context. I have designed several experiments for different segments of participants based on their current mode of choice. Asking "First and Second-best" allows me to understand their ranking of the three options, which is why I believe ...

Hi Michiel,

I am grateful for all your support as we prepare to start our pilot study.

We have incorporated "Opt-out" and "Status-quo" options in our SP experiments. To ensure we gather meaningful trade-offs, even when participants choose "Opt-out" or "Status-quo" initially, we have implemented a ...

Hi Michiel,

Thank you for your reply. And I believe it's necessary to specify priors of scenario attribute Weather for every alternatives. And I add b16 and b17 respectively in the code below. However, this script can work before I add these two parameters, and cannot find any design after adding ...

Hi Michiel,

I have further questions about the scenario attribute.

In my DCE, the first attribute is weather, represented as W in the script. Upon reviewing the manual, I observed that the scenario attribute can be designated as W[W] for alternatives following the first one to maintain ...

Hi Michiel,

Thank you for your thorough feedback and suggestions.

Regarding the issue of too many constraints, I'd like to explain the logic behind my survey design.

For the alternative combining public transport (pt) and shared micro-mobility (smm) - ptsmm - I've set four levels of smm travel ...

To the Ngene support team,

I am a PhD student at the University of Queensland, currently conducting a choice study on mode selection concerning micro-mobility. I also apply SurveyEngine as part of my survey design.

Here is my current script of Ngene design:
design
;alts = pmm, ptsmm, car
;rows ...