Dear Prof. Bierlaire,
I have some basic questions about the multinomial logit model (I'm just a begginer on using Biogeme) and I would appreciate if you could help me:
1. Is possible to use qualitative variables on my model? Or should I convert every one in numerical variable/dummy? For exemple, what should I do with answers in likert scale. How does Biogeme know if I'm using a qualitative or a quantitative variable (or even a dummy)?
2. Is possible to generate a model if I had NaN values on my database?
Thanks,
best regards,
Carol.