Analyzing Frequencies of Several Types of Events: A Mixed Multinomial- Poisson Approach

A flexible, generalized Poisson model is combined with the multinomial distribution to jointly predict households' choices among types of trips and frequency of trips. The model is compared with conventional Poisson models. The problem of a time-variant mean for frequencies is also addressed, a...

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Bibliographic Details
Published in:The review of economics and statistics 1990-02, Vol.72 (1), p.108-115
Main Authors: Terza, Joseph V., Wilson, Paul W.
Format: Article
Language:English
Subjects:
Commuting
Economic models
Economic statistics
Economic theory
Households
Integers
Modeling
Musical intervals
Parametric models
Regression analysis
School trips
Shopping
Studies
Traffic estimation
Transportation studies
Travel
Variables
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Summary:A flexible, generalized Poisson model is combined with the multinomial distribution to jointly predict households' choices among types of trips and frequency of trips. The model is compared with conventional Poisson models. The problem of a time-variant mean for frequencies is also addressed, as well as the mean-variance property of the conventional Poisson model which is avoided by use of the generalized formulation. The generalized model is found to outperform the conventional models.
ISSN:0034-6535
1530-9142
DOI:10.2307/2109745