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Actualización de la Inversa de Leontief


  • Xesús Pereira López

    () (Economía Cuantitativa-IDEGA, USC)

  • José Luis Quiñoá López

    () (Economía Cuantitativa, USC)

  • André Carrascal Incera

    () (IDEGA, USC)


Among the many matrix updating techniques available, basic RAS and its extensions are the most popular. RAS is a biproportional adjustment method, consisting in reiterative multiplication of row and column elements of a base matrix by correction coefficients. This technique is almost invariably used on the technical coefficients matrix (or on the intermediate consumption matrix), but it is adaptable to other cases. The most usual formulation of the technique represents it as an optimization program minimizing a distance among matrixes subject to several constraints. This paper shows instead a scale algorithm representation corresponding to the direct application of RAS on the Leontief inverse matrix. The requisite for obtaining a coherent solution in this case is to work simultaneously with the demand model and the price model.

Suggested Citation

  • Xesús Pereira López & José Luis Quiñoá López & André Carrascal Incera, 2012. "Actualización de la Inversa de Leontief," Documentos de trabajo - Analise Economica 0050, IDEGA - Instituto Universitario de Estudios e Desenvolvemento de Galicia.
  • Handle: RePEc:edg:anecon:0050

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    References listed on IDEAS

    1. Xesús Pereira López & José Luis Quiñoá López & Melchor Fernández Fernández, 2011. "Máximo aprovechamiento de métodos de actualización matricial," Documentos de trabajo - Analise Economica 0041, IDEGA - Instituto Universitario de Estudios e Desenvolvemento de Galicia.
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    More about this item


    matrix updating; input-output; Leontief inverse; RAS;

    JEL classification:

    • C65 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Miscellaneous Mathematical Tools
    • C67 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Input-Output Models
    • D57 - Microeconomics - - General Equilibrium and Disequilibrium - - - Input-Output Tables and Analysis

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