Working Papers, Department of Economics, Lund University
Lena Winslott Hiselius
Preferences regarding road transports of hazardous materials using choice experiments - any sign of biases?
Abstract: This paper uses the choice experiment approach to assess
people's preferences regarding road transports of hazardous materials. In a
mail survey, carried out in Stockholm, the capital of Sweden, changes in
exposure to hazardous materials are used as a proxy for changes in accident
risk. The results are analysed in the light of an earlier study on
transports of hazardous materials by rail. Special attention is given to
biases associated with the choice experiment method. The presence of
hypothetical bias is studied by the use of self-reported degree of
confidence that the respondent would vote the same way in a real
referendum. The presence of a focusing effect is studied by an inclusion of
information on other fatal risks. The indication is that there are no major
differences in individual preferences for hazmat transported by rail or
road. The estimates are also dependent on the confidence of stated choices
and interpreting this dependence as a hypothetical bias, suggest that this
type of bias tends to push estimated values downwards. The findings show
that individual background data regarding transports of hazardous materials
affect individuals in expected ways and there is no focusing effect.
Keywords: Biases; Hazardous materials; Risk; Choice experiments; (follow links to similar papers)
JEL-Codes: C25; D61; D81; R41; (follow links to similar papers)
32 pages, May 23, 2005
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