An input-output based approach to the short-term evaluation of transportation plans (Q1090224)

This paper deals with the formulation of an evaluation models for investment in transportation infrastructure. The approach is based on a multiregional input-output model, which allows for the explicit representation of the wide range of substitution effects that may be triggered by non-marginal changes of the transportation system. Besides taking into account trade flows, other characteristics of transportation within the multiregional system are introduced through an appropriate set of constraints. The definition of a goal function allows for a treatment in terms of mathematical programming. The results show how diseconomies due to the mismatch between the spatial structures of production and consumption can be calculated and decomposed into components associated, respectively, with location and transportation.