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Anomalies in the Value of Travel-Time Changes

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  • Lars Hultkrantz
  • Reza Mortazavi

Abstract

Standard practice in econometric estimation of the value of travel-time changes divides travellers into market segments and assumes linear utility functions in each category. Here instead we derive a RUM-model from a second-order approximation to the utility function. The model is estimated by probit on data from a recent SP value-of-travel-time study. The influence of socio-economic variables, trip duration, and so on, on the value of travel-time changes is estimated and tested. Our conclusions differ in several ways from those of a previous study evaluating the same dataset with the conventional method. We find a considerably lower value of travel-time savings and signs of a cognitive threshold; respondents decline travel time savings smaller than 10-15 minutes irrespectively of the bid price. The non-linear approach also provides a convenient means for benefits transfer, that is, to calculate the mean value of time savings for a specific road project, depending on how it will be used, and by whom. ? The London School of Economics and the University of Bath 2001

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Bibliographic Info

Article provided by London School of Economics and University of Bath in its journal Journal of Transport Economics and Policy.

Volume (Year): 35 (2001)
Issue (Month): 2 (May)
Pages: 285-299

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Handle: RePEc:tpe:jtecpo:v:35:y:2001:i:2:p:285-299

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Web page: http://www.bath.ac.uk/e-journals/jtep

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Cited by:
  1. De Borger B. & Mogens F., 2006. "Discrete choices and the trade off between money and time: Another test of the theory of reference dependent preferences," Working Papers 2006034, University of Antwerp, Faculty of Applied Economics.
  2. Börjesson, Maria, 2012. "Inter-temporal variation in the travel time and travel cost parameters of transport models," Working papers in Transport Economics 2012:16, CTS - Centre for Transport Studies Stockholm (KTH and VTI).
  3. Mogens Fosgerau, 2004. "Investigating the distribution of the value of travel time savings," Urban/Regional 0410005, EconWPA, revised 25 Nov 2004.
  4. Hjorth, Katrine & Fosgerau, Mogens, 2012. "Using prospect theory to investigate the low marginal value of travel time for small time changes," Transportation Research Part B: Methodological, Elsevier, vol. 46(8), pages 917-932.
  5. Katrine Hjorth & Mogens Fosgerau, 2011. "Loss Aversion and Individual Characteristics," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 49(4), pages 573-596, August.
  6. Ozbay, Kaan & Yanmaz-Tuzel, Ozlem, 2008. "Valuation of travel time and departure time choice in the presence of time-of-day pricing," Transportation Research Part A: Policy and Practice, Elsevier, vol. 42(4), pages 577-590, May.
  7. Fosgerau, Mogens, 2007. "Using nonparametrics to specify a model to measure the value of travel time," MPRA Paper 12009, University Library of Munich, Germany.
  8. De Borger, Bruno & Fosgerau, Mogens, 2007. "Discrete choices and the trade-off between money and time: A test of the theory of reference-dependent preferences," MPRA Paper 3904, University Library of Munich, Germany.
  9. Isacsson, Gunnar & Swärdh, Jan-Erik, 2007. "An empirical on-the-job search model with preferences for relative earnings: How high is the value of commuting time?," Working Papers 2007:12, Swedish National Road & Transport Research Institute (VTI).

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