Zero Inflated CUB Models For The Evaluation Of Leisure Time Activities

The paper is concerned with the analysis of ordinal variables collected in surveys which allow to consider zero responses to account for absence of the latent trait (pain perception, satisfaction, agreement, engagement in a certain activity, and so on). In particular, the contribution deals with zero-inflated mixture models, by putting particular emphasis on the uncertainty characterizing the evaluation process. The proposed methodology is tailored to discriminate between structured and unstructured zeros and it is discussed on the basis of a survey investigating interest and involvement in leisure time activities.