A HAZARD-BASED DURATION MODEL OF SHOPPING ACTIVITY WITH NONPARAMETRIC BASELINE SPECIFICATION AND NONPARAMETRIC CONTROL FOR UNOBSERVED HETEROGENEITY
In this paper, the author examines 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. Empirical results indicate significant effects of unobserved heterogeneity on shopping activity duration of individuals. Further, it is found 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.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01912615
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Corporate Authors:
The Boulevard, Langford Lane
Kidlington, Oxford United Kingdom OX5 1GB -
Authors:
- Bhat, C R
- Publication Date: 1996-6
Language
- English
Media Info
- Features: References; Tables;
- Pagination: p. 189-207
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Serial:
- Transportation Research Part B: Methodological
- Volume: 30
- Issue Number: 3
- Publisher: Elsevier
- ISSN: 0191-2615
- Serial URL: http://www.sciencedirect.com/science/journal/01912615
Subject/Index Terms
- TRT Terms: Hazard analysis; Heterogeneity; Samples; Shopping; Time duration
- Uncontrolled Terms: Activity models; Duration
- Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; Society; I70: Traffic and Transport;
Filing Info
- Accession Number: 00723224
- Record Type: Publication
- Files: TRIS, ATRI
- Created Date: Jul 1 1996 12:00AM