LINEAR OR NONLINEAR UTILITY-FUNCTIONS IN LOGIT-MODELS - THE IMPACT ONGERMAN HIGH-SPEED RAIL DEMAND FORECASTS

We have shown that nonlinearity of the representative utility function s of the Logit model applied to an intercity mode choice model implied the presence of asymmetry and of thresholds in the response curve, as well as results that had more reasonable properties (diminishing marg inal values of time savings, elasticities and values of time that diff ered among the modes), and yielded very different high-speed rail mark et shares for Germany than results obtained with the usual linear util ity functions.