首页> 外文期刊>Transportation >Income effects, cost damping and the value of time: theoretical properties embedded within practical travel choice models
【24h】

Income effects, cost damping and the value of time: theoretical properties embedded within practical travel choice models

机译:收入效应,成本衰减和时间价值:实际出行选择模型中嵌入的理论属性

获取原文
获取原文并翻译 | 示例
       

摘要

Mackie et al. (Values of travel time savings in the UK. Report to Department for Transport. Institute for Transport Studies, University of Leeds & John Bates Services, Leeds and Abingdon, 2003) proposed an identity relating the value of time (VoT) for commute and leisure travel to income and travel cost, reporting the prevalence of ‘cost damping’ (i.e. the phenomenon where VoT increases as travel cost increases). This identity (or a variant thereof) has been adopted within official methods for estimating VoT in the UK, Switzerland and The Netherlands. The present paper shows that Mackie et al.’s identity: (i) implies linear preferences, not strictly convex preferences as reported by Mackie et al.; (ii) complies with homogeneity and symmetry by construction; (iii) complies with adding-up if and only if VoT is unit elastic with respect to income; (iv) complies with negativity if VoT is unit elastic or greater with respect to income; (v) violates both adding-up and negativity in the case of the 2003 UK national VoT study. We propose alternative identities which comply with adding-up and homogeneity by construction, and offer comparable fit to Mackie et al.’s identity on the UK VoT dataset. We also find that the imposition of adding-up and negativity on Mackie et al.’s identity, through appropriate constraint on model estimation, leads to an increase of around 20% in valuations from the 2003 UK dataset.
机译:Mackie等。 (在英国节省旅行时间的价值。向运输部的报告。利兹大学和约翰·贝茨服务研究所交通研究,利兹和阿宾登,2003年)提出了一种与通勤和休闲时间价值(VoT)有关的身份到收入和差旅成本,报告“成本衰减”的普遍性(即VoT随着差旅成本增加而增加的现象)。在英国,瑞士和荷兰,此身份(或其变体)已被用于估算VoT的官方方法采用。本文证明了Mackie等人的身份:(i)暗示线性偏好,而不是Mackie等人所报道的严格凸偏好; (ii)通过构造符合同质性和对称性; (iii)在且仅当VoT对收入具有单位弹性时,才符合加法; (iv)如果VoT在收入方面具有单位弹性或更大,则符合否定性; (v)在2003年英国国家VoT研究中违反了加法和否定法。我们提出了替代的身份,这些身份应符合构造的加法和同质性,并与Mackie等人在英国VoT数据集上的身份具有可比性。我们还发现,通过对模型估计进行适当的约束,对Mackie等人的身份施加加法和否定性会使2003年英国数据集的估值增加约20%。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号