A major breakthrough in travel demand modeling in the early 1970s was
modeling based on disaggregate (individual) level data (McFadden 2001).
Although the disaggregate model focuses on individual level behavior, the
estimated model parameters are fixed across individuals. To incorporate
unobserved taste variations across individuals, recent developments allow for
the parameters to vary across individuals, such as the Mixed Logit model,
where the parameters are assumed to follow a distribution. The mixed logit
model recognizes the differences among individuals, but it does not
distinguish...