Approximate Asymptotic Variance-Covariance Matrix for the Whittle Estimators of GAR(1) Parameters
被引:6
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作者:
Shitan, Mahendran
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机构:
Univ Putra Malaysia, Dept Math, Serdang 43400, Malaysia
Univ Putra Malaysia, Inst Math Res, Lab Computat Stat & Operat Res, Serdang 43400, MalaysiaUniv Putra Malaysia, Dept Math, Serdang 43400, Malaysia
Shitan, Mahendran
[1
,2
]
Peiris, Shelton
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机构:
Univ Sydney, Sch Math & Stat, Sydney, NSW 2006, AustraliaUniv Putra Malaysia, Dept Math, Serdang 43400, Malaysia
Peiris, Shelton
[3
]
机构:
[1] Univ Putra Malaysia, Dept Math, Serdang 43400, Malaysia
[2] Univ Putra Malaysia, Inst Math Res, Lab Computat Stat & Operat Res, Serdang 43400, Malaysia
[3] Univ Sydney, Sch Math & Stat, Sydney, NSW 2006, Australia
Generalized Autoregressive (GAR) processes have been considered to model some features in time series. The Whittle's estimates have been investigated for the GAR(1) process by a simulation study by Shitan and Peiris (2008). This article derives approximate theoretical expressions for the enteries of the asymptotic variance-covariance matrix for those estimates of GAR(1) parameters. These results are supported by a simulation study.