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Andersson, Henrik (2013) Consistency in preferences for road safety: An analysis of precautionary and stated behavior. Research in Transportation Economics, 43 (1). pp. 41-49.
Ivaldi, Marc and Mccullough, Gerard J. (2007) Railroad Pricing and Revenue-To-Cost Margins in the Post-Staggers Era. Research in Transportation Economics, 20. pp. 153-178.