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Bayesian Analysis of Road Accidents: A General Framework for Multinominal Case

Author

Listed:
  • Bolduc, D.
  • Bonin, S.

Abstract

The detection of dangerous road sites is usually performed using empirical methods which focus on observed accident frequencies and/or proportions of accidents with a given feature. The most widely used detection tools have an empirical Bayes (EB) background. The EB approaches rely on the comparison of frequencies and/or proportions of accidents at a given site with the amounts that would normally occur at similar sites. Currently, analytical techniques for accident proportions describe the number of accidents with a given feature using a binomial distribution. This paper extends to the multinomial case the general EB technique that we recently suggested to analyze road accident proportions. Our proposed approach is a full-information Bayes method that allows for both deterministic and random heterogeneity as well as spatial-correlation among the sites under investigation. The technique can also be used to analyze accident frequencies. An empirical example based on accident data taken from the Québec city database, will serve to demonstrate its usefulness.

Suggested Citation

  • Bolduc, D. & Bonin, S., 1998. "Bayesian Analysis of Road Accidents: A General Framework for Multinominal Case," Papers 9802, Laval - Recherche en Politique Economique.
    • Handle: RePEc:fth:lavape:9802
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    Keywords

    ROAD ACCIDENTS ; ECONOMIC MODELS;

    JEL classification:

    • C50 - Mathematical and Quantitative Methods - - Econometric Modeling - - - General
    • C52 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Evaluation, Validation, and Selection
    • L91 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Transportation: General

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