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Properties Of Predictors In Overdifferenced Nearly Nonstationary Autoregression

Author

Listed:
  • Daniel Peña

    (Universidad Carlos III de Madrid)

  • Ismael Sánchez

    (Universidad de Alicante)

Abstract

This paper analyzes the effect of overdifferencing a stationary AR(p+1) process whoselargest root is near unity. It is found that if the process is nearly nonstationary, the estimators ofthe overdifferenced model ARIMA (p, 1, 0) are root-T consistent. It is also found that thismisspecified ARIMA (p, 1, 0) has lower predictive mean squared error, to terms of small order,that the properly specified AR(p+1) model due to its parsimony. The advantage of theoverdifferenced predictor depends on the remaining roots, the prediction horizon, and the meanof the process.

Suggested Citation

  • Daniel Peña & Ismael Sánchez, 1999. "Properties Of Predictors In Overdifferenced Nearly Nonstationary Autoregression," Working Papers. Serie AD 1999-08, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
    • Handle: RePEc:ivi:wpasad:1999-08
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    References listed on IDEAS

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    Cited by:

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    2. Alfredo Garcia Hiernaux & Miguel Jerez & José Casals, 2005. "Unit Roots and Cointegrating Matrix Estimation using Subspace Methods," Documentos de Trabajo del ICAE 0512, Universidad Complutense de Madrid, Facultad de Ciencias Económicas y Empresariales, Instituto Complutense de Análisis Económico.

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