A New Method for Obtaining the Autocovariance of an Arma Model: An Exact Form Solution
This paper presents a new method for computing the theoretical autocovariance function of an autoregressive-moving average model. The importance of the reesult is that it yields two interesting results: (1) a closed form solution is derived in terms of roots of the autoregressive polynomial and the parameters of the moving average part, (2) a sufficient condition for lack of model redundancy is obtained.
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|Date of creation:||1997|
|Date of revision:|
|Publication status:||Published in Econometric Theory, 1998, Vol. 14, pages 622-640.|
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|Order Information:|| Postal: Department of Economics, Keele University, Keele, Staffordshire ST5 5BG - United Kingdom|
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