Attitudes and Value of Time Heterogeneity
Attitudes and Value of Time Heterogeneity
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时间异质性的态度和价值
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Hess
中科院分区：
文献类型：
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作者：
M. Zeid;M. Ben;M. Bierlaire;C. Choudhury;S. Hess
有充分的证据表明，旅行者的时间价值存在高度异质性。以前的研究代表了这种异质性的分布，如对数正态分布，其参数取决于协变量，如收入，旅行目的和旅行方式。作者提出并演示了一个模型，其中时间价值的分布也取决于对旅行的态度。态度是潜在的，或不可观察的，它们的分布决定了给定可观察协变量（如收入）的时间价值的条件分布。作者用一个陈述的偏好调查的数据来说明这个模型。估计结果表明，正如预期的那样，时间的中值随着收入的增加而增加，时间价值的可变性也随着收入的增加而增加，反映出对旅行的态度对高收入群体的影响更大。
There is ample evidence showing a high level of heterogeneity of values of time among travelers. Previous studies have represented this heterogeneity by a distribution such as log-normal whose parameters depend on covariates like income, trip purpose, and mode of travel. The authors present and demonstrate a model where the distribution of the value of time also depends on attitudes towards travel. Attitudes are latent, or unobservable, and their distribution determines the conditional distribution of the value of time given the observable covariates such as income. The authors illustrate this model using data from a stated preferences survey. The estimation results show that as expected the median value of time increases with income and that the variability of value of time also increases with income reflecting the greater effect that the attitude towards travel has for high income groups.