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Especificación dinámica: comparación entre distintas estrategias

  • Autores: Jordi Arcarons i Bullich, Carlos Murillo Fort Árbol académico
  • Localización: Questiió: Quaderns d'Estadística, Sistemes, Informatica i Investigació Operativa, ISSN 0210-8054, Vol. 11, Nº. 1, 1987, págs. 49-59
  • Idioma: español
  • Títulos paralelos:
    • Dynamic specification: comparison of different strategies
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  • Resumen
    • In the present article we realize a comparative study between two alternative methods aimed to the specification of dynamic relationships between economic variables. On one hand, we will make use of the corner method as a procedure to identify the lag structures and to estimate the parameters involved in a transfer function model. On the other hand, we will resort to common factor analysis (COMFAC) as a procedure to develop the specification strategy in the dynamic models case. In this case we take as starting point a general model -overparametrized- and, by means of a sequence of tests about the relations between parameters, we proceed to simplificate common terms.

      Both methods advantages and shortcomings are illustrated by means of a simulation exercise that, on one hand, allows us to expose the operative problems associated to each case and, on the other hand, brings us to recommend as a method to specificate dynamic relations a twofold approach that consists in taking advantage of the results obtained from the approach suited to the transfer function models, together with the information provided a priori by the Economic Theory


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