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dc.creatorBhat, Chandra R.en
dc.date.accessioned2014-04-18T19:49:34Zen
dc.date.available2014-04-18T19:49:34Zen
dc.date.issued1996en
dc.identifier.citationBhat, C.R. (1996), "A Hazard-Based Duration Model of Shopping Activity with Nonparametric Baseline Specification and Nonparametric Control for Unobserved Heterogeneity", Transportation Research Part B, Vol. 30, No. 3, pp. 189-207.en
dc.identifier.urihttp://hdl.handle.net/2152/24045en
dc.descriptionAt the time of publication C.R. Bhat was at the University of Massachusetts at Amherst.en
dc.description.abstractActivity duration is an important component of the activity participation behavior of individuals, and therefore, an important determinant of individual travel behavior. In this paper, we examine the factors affecting shopping activity duration during the return home from work and develop a comprehensive methodological framework to estimate a stochastic hazard-based duration model from grouped (interval-level) failure data. The framework accommodates a nonparametric baseline hazard distribution and allows for nonparametric control of unobserved heterogeneity, while incorporating the effects of covariates. The framework also facilitates statistical testing of alternative parametric assumptions on the baseline hazard distribution and on the unobserved heterogeneity distribution. Our empirical results indicate significant effects of unobserved heterogeneity on shopping activity duration of individuals. Further, we find that parametric forms for the baseline hazard and unobserved heterogeneity distributions are inadequate, and are likely to lead to substantial biases in covariate effects and hazard dynamics. The empirical results also provide insights into the determinants of shopping activity duration during the commute trip.en
dc.language.isoengen
dc.publisherElsevieren
dc.subjectunobserved heterogeneityen
dc.subjectactivity durationen
dc.subjecttravel patternsen
dc.subjectshopping behavioren
dc.titleA hazard-based duration model of shopping activity with nonparametric baseline specification and nonparametric control for unobserved heterogeneityen
dc.typeArticleen
dc.description.departmentCivil, Architectural, and Environmental Engineeringen


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