Evaluacion Economica Sectorial de la Inversion en Infraestructuras del Transporte: Aplicacion al Vector de Inversiones 1990-1998 en España

Para la evaluacion de una inversion en infraestructuras del transporte, existen varios enfoques. El enfoque intersectorial permite una desagregacion del impacto de la inversion. Se suele utilizar complementariamente a los enfoques 'agregados': se emplea como filtro la matriz de coeficientes tecnicos de una tabla input-output. Esta metodologia es inapropiada ante cambios en los coeficientes. Se propone un enfoque que reconcilie las informaciones que inciden en la tabla, lo que permitira un cambio controlado de los coeficientes. El enfoque se basa en un modelo matematico y unas etapas metodologicas. Se evaluo la inversion en infraestructuras del transporte en el periodo 1990-1998. <p> There are several approaches in order to assess an investment in transport infrastructure. Intersectoral approach allows a desaggregation of the investment effect. It is usually employed in combination with other aggregated approaches: it is used as a filter the technical coefficients matrix of an input output table. This methodology is not appropriate if there are changes in the coefficients. We propose an approach that takes into account information that has influence over the table, which allows for a controlled change in the coefficients. This approach is based on a mathematical model and some methodological stages. It was evaluated the investment in transport infrastructure in period 1990 1998.