Nested continuation logit models for ordinal variables

In many applications, respondents are asked to select among a list of ordered categories to express their personal level of agreement or opinion about attitudes, lifestyles, services, items etc, and the choice among all the ordered alternatives may stem from quite different mechanisms. We assume a sequential mechanism such that every respondent makes a decision by discarding consecutive categories, starting from the first in the list, until the category that reflects his/her status occurs.