An Exact Maximum Likelihood Estimation Procedure for Regression- ARMA Time Series Models with Possibly Nonconsecutive Data
允许非连续观测的回归—ARMA时间序列模型精确极大似然估计AI 解读 ↓
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允许非连续观测的回归—ARMA时间序列模型精确极大似然估计AI 解读 ↓
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SUMMARY An explicit procedure is given to obtain the exact maximum likelihood estimates of the parameters in a regression model with ARMA time series errors with possibly nonconsecutive data. The method is based on an innovation transformation approach from which an explicit recursive procedure is derived for the efficient calculation of the exact likelihood function and associated derivatives. The innovations and associated derivatives are used to develop a modified Newton-Raphson procedure for computation of the estimates. A weighted nonlinear least squares interpretation of the estimator is also given. A numerical example is provided to illustrate the method.