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Economic valuation of road injuries in Japan by standard gamble

Author

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  • Shinya Koyama

    (University of Hyogo)

  • Kenji Takeuchi

    (Kobe University)

Abstract

During fiscal year 1997 the Ministry of Land, Infrastructure, and Transport of Japan introduced a system for evaluating road investment projects that considers reduction of road accidents as well as savings in time and running costs. However, the unit cost to calculate the benefit of reducing road accidents was not based on willingness to pay. In this study, we estimated the weight of road injuries against fatalities based on Japanese people’s preferences by a standard gamble approach. In the primary investigation, we estimated the weight of serious injuries based on social preference as well as usual private preference; no obvious differences were observed. Our results were slightly larger than those in the United Kingdom. In the secondary investigation, we estimated the weight of slight injuries and serious injuries using standard gambles. We prepared two questionnaires to assess whether differences in choices affect the results. There was no conclusive proof either way. Finally, we expressed the loss of road injuries in monetary terms by multiplying the weight of injuries to the value of a statistical life and derived a much higher estimate of total costs due to accidents than did the Japanese government.

Suggested Citation

  • Shinya Koyama & Kenji Takeuchi, 2004. "Economic valuation of road injuries in Japan by standard gamble," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 6(2), pages 119-146, June.
    • Handle: RePEc:spr:envpol:v:6:y:2004:i:2:d:10.1007_bf03353934
    DOI: 10.1007/BF03353934
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    1. Jones-Lee, M W & Hammerton, M & Philips, P R, 1985. "The Value of Safety: Results of a National Sample Survey," Economic Journal, Royal Economic Society, vol. 95(377), pages 49-72, March.
    2. Krupnick, Alan & Alberini, Anna & Cropper, Maureen & Simon, Nathalie & O'Brien, Bernie & Goeree, Ron & Heintzelman, Martin, 2002. "Age, Health and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey of Ontario Residents," Journal of Risk and Uncertainty, Springer, vol. 24(2), pages 161-186, March.
    3. Jones-Lee, Michael W & Loomes, Graham & Philips, P R, 1995. "Valuing the Prevention of Non-fatal Road Injuries: Contingent Valuation vs. Standard Gambles," Oxford Economic Papers, Oxford University Press, vol. 47(4), pages 676-695, October.
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