EXACT MAXIMUM LIKELIHOOD ESTIMATE AND LAGRANGE MULTIPLIER TEST STATISTIC FOR ARMA MODELS
作者:
Pham Dinh Tuan,
期刊:
Journal of Time Series Analysis
(WILEY Available online 1987)
卷期:
Volume 8,
issue 1
页码: 61-78
ISSN:0143-9782
年代: 1987
DOI:10.1111/j.1467-9892.1987.tb00421.x
出版商: Blackwell Publishing Ltd
关键词: ARMA model;Fisher's scoring method;Lagrange multiplier test;Likelihood function;Periodogram;Spectral density
数据来源: WILEY
摘要:
Abstract.The paper provides a method for the computation of the derivatives of the exact log likelihood function of a Gaussian time series. Based on this result and using Fisher's scoring technique, an efficient method for computing the maximum likelihood estimates for an autoregressive moving average model has been obtained. Simulations suggest that the new procedure is as fast as the Box and Jenkins conditional least squares method. In a similar way, a procedure is derived to compute the Lagrange multiplier test statistics for testing the goodness of fit of the model.
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