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The valuation and demand impacts of the worthwhile use of travel time with specific reference to the digital revolution and endogeneity

机译：有价值地利用旅行时间的估值和需求对数码革命和内亲关的特定参考

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The research reported here is concerned with how the worthwhile use of travel time might impact on the value of travel time savings (VTTS) and on demand set in the context of the rail travel market in Great Britain. It has long been recognised, in a variety of literature, that improvements in worthwhile activities which will have been delivered by the digital revolution will impact VTTS and demand yet there is surprisingly little reliable evidence and official appraisal practice does not accommodate any such effects. In a large survey of rail travellers, we have explored how activities while travelling impact on VTTS and demand. An important feature of the study was to account for endogeneity whereby variations in VTTS estimates according to the worthwhile use of time are biased if drawn from comparisons across individuals of what they do while travelling rather from comparing within individual variations in activities. Indeed, we clearly demonstrate the impact of not allowing for endogeneity and indicate its presence in other studies. We find that the VTTS does vary according to activities undertaken while travelling in a largely credible manner and is broadly consistent with behavioural responses to different available activities. The evidence supports the VTTS falling over time due to the digital revolution and rail demand increasing. These are modest rather than considerable changes but nonetheless contribute a better understanding of evidence relating to VTTS and rail demand variations over time.
机译：这里报告的研究涉及旅行时间的有价值的使用可能会对旅行时间储蓄（VTT）的价值产生影响，并在英国铁路旅行市场的背景下设定。它已经长期以来，在各种文献中，通过数字革命所提供的有价值的活动的改善将影响vtts和需求，但令人惊讶的是可靠的证据，官方评估实践不会适应任何这些影响。在对铁路旅行者进行了大量调查中，我们探讨了如何在对VTT和需求产生影响时的活动。该研究的一个重要特征是考虑内核性，从而根据有价值的时间的VTTS估计的变化如果从他们在行驶中的各个人的情况下从各个人的比较中汲取的比较，则偏见。实际上，我们清楚地证明了不允许内生物性的影响，并表明其在其他研究中的存在。我们发现，VTTS确实根据以大部分可信的方式进行的活动而变化，并且与对不同可用活动的行为响应广泛一致。由于数字革命和铁路需求增加，证据支持随着时间的推移而堕落的差异。这些是谦虚而不是相当大的变化，但仍然有助于更好地了解与VTTS和铁路需求变化的证据随着时间的推移。

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