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A BAYESIAN APPROACH FOR ESTIMATING AUTOREGRESSIVE MOVING AVERAGE MODELS

المصدر: مجلة البحوث التجارية
الناشر: جامعة الزقازيق - كلية التجارة
المؤلف الرئيسي: Hussein, Hassan M. A. (Author)
المجلد/العدد: مج30, ع2
محكمة: نعم
الدولة: مصر
التاريخ الميلادي: 2008
الشهر: يوليو
الصفحات: 29 - 51
رقم MD: 665250
نوع المحتوى: بحوث ومقالات
قواعد المعلومات: EcoLink
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المستخلص: A Bayesian method for estimating autoregressive-moving average (ARMA) models is proposed. The proposed methodology is based on replacing lagged errors of the original ARMA model with appropriately lagged residuals from a long auto regression .Bayes estimators have been developed under non-informative and natural conjugate priors. Moreover, the estimation of the parameters for the ARMA representation can be obtained by using a non-Bayesian method, namely the three- stage least squares (3SLS) method. These methods are compared using simulated and real data. A numerical comparison between Bayesian and non-Bayesian will be carried out .It has been seen that the obtained estimators not available in a compact form, although they can be easily evaluated numerically. Moreover, the proposed method (Bayesian procedure) produce estimates with greater precision (smaller MSE) than that for the 3SLS procedure.

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