Abstract
An ARMA(p, q) process observed with an ARMA(c, d) error has an ARMA (p + c, k) representation with k = max(c + q, p + d) whose parameters satisfy some nonlinear constraints. Identification of the model is discussed. We develop Newton-Raphson estimators for the ARMA(p + c, k) process which take advantage of the information contained in the nonlinear restrictions. Explicit expressions for the derivatives of the restrictions are derived.
Original language | English |
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Pages (from-to) | 1057-1072 |
Number of pages | 16 |
Journal | Communications in Statistics - Theory and Methods |
Volume | 26 |
Issue number | 5 |
DOIs | |
State | Published - 1997 |
Bibliographical note
Funding Information:This research is supported by a grant from Korea Science and Engineering
Keywords
- ARMA error
- Identification
- Maximum likelihood estimation
- Newton-Raphson procedure