Modelos input-output rectangulares mediante inversas generalizadas

• Pereira López, Xesús ^[1] ; Fernández Fernández, Melchor ^[1] ; Miranda Torrado, Fernando ^[1] ; Carrascal Incera, André ^[1]
  1. [1] Universidade de Santiago de Compostela

     Universidade de Santiago de Compostela

     Santiago de Compostela, España

     
• Localización: Anales de ASEPUMA, ISSN-e 2171-892X, Nº. 20, 2012
• Idioma: español
• Enlaces
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• Resumen
  • español

    La explotación óptima de datos conocidos debe prevalecer en los estudios económicos. Aunque, en la modelización económica vinculada a las tablas supply-use se desatiende bastante este aspecto. De hecho, como en este formato el número de productos supera al número de industrias, se pierde mucha información al ejecutar agregaciones para conseguir matrices cuadradas. No obstante, las matrices rectangulares se pueden abordar directamente mediante el uso de inversas generalizadas.

    El principal objetivo de este artículo es enfatizar que la elaboración de tablas simétricas input-output no es en un trámite obligatorio, e incluso innecesario. A pesar de ello, se recuerda el procedimiento a seguir para construir matrices simétricas mediante las hipótesis de tecnología de producto e industria. Por último, se plasma una aplicación práctica con vistas a resaltar las distintas alternativas de análisis económico en este ámbito.

  • English

    In economic studies should prevail the utilization of available data. Despite this, in economic modelling related with supply-use tables this aspect is ignored. In fact, as in this format the number of products exceeds the number of industries, considerable information is lost due to the aggregations in order to get square matrices. However, the rectangular matrices can directly be modelled using generalized inverses.

    The main aim of this paper is to highlight the fact that it is not obligatory elaborate symmetric input-output tables for modelling. In spite of it, in this paper it is reminded how to construct symmetric matrices through the two traditional hypotheses: product technology and industry technology. Finally, it is shown an empirical application with the goal of highlight different alternatives in this area.

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