4) Hensher, D.: The valuation of commuter travel time savings for car drivers: evaluating alternative model specification, Transportation 28, p101-118, 2001.
5) Hensher, D., Stopher, P., and Louviere, J.: An exploratory analysis of the effect of numbers of choice sets in designed choice experiments: an airline choice application, Journal of Air Transport Management, Vol.7, p373-379, 2001.