Abstract
An approach to estimate differential inter-zonal marginal costs for a transport system is presented. The approach is illustrated in detail through an application using monthly time series data of a Chilean trucking company. The results reveal important differences among marginal cost estimates over different origin-destination pairs. The method highlights the trade-off between the vectorial treatment of output and the flexibility of aggregation functions in the "generalised disjoint aggregation matrix"; results suggest some advantages of preserving disaggregation. (Author/publisher).