Abstract
DISAGGREGATE PROBABILISTIC CHOICE MODELS ARE ESTIMATED AT THE LEVEL OF INDIVIDUAL BEHAVIOURAL UNIT: THIS PRESENTS PROBLEMS IN PROVIDING AGGREGATE PREDICTIONS, SUCH AS AGGREGATE ELASTICITY ESTIMATES. THIS PAPER PROVIDES SOME COMPARATIVE ASSESSMENT OF VARIOUS AVAILABLE MEASURES, CONCENTRATING ON A BINARY LOGIT MODEL FOR SIMPLICITY AND USING A STUDY OF MODE CHOICE FOR THE JOURNEY TO WORK BETWEEN LIVINGSTON NEW TOWN AND EDINBURGH FOR EMPIRICAL APPLICATION. ONE SECTION CONSIDERS THE AVAILABLE POINT AND ARC ELASTICITY MEASURES AT BOTH THE INDIVIDUAL AND AGGREGATE LEVELS. THE RESULTS ARE PRESENTED OF THE EMPIRICAL APPLICATION OF THE VARIOUS MEASURES.