Hello, I have a question related to multinomial logit model and conditional logit model. I have read a book (logistic regression using SAS Theory and Application), the book stated that multinomial logit model is a special case of the conditional logit model, while it also stated that the multinomial logit model and conditional logit model differ in two ways: conditional logit model can include characteristics related to the choice options; the set of available options can vary across individuals in the analysis.

Suppose I have a research in which different participants may be facing different options, therefore, which model (multinomial logit model and conditional logit model ) should I use? Can I keep using multinomial logit model since it is just a special case of conditional logit model?

Thank you.

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