This paper introduces a new class of estimates for estimating the parameter vector of a first-order bifurcating autoregressive model. The estimates minimize a sum of weighted absolute deviations where the weights are of the Schweppe variety. Asymptotic linearity properties are derived for the so called WL1-estimate. Based on these properties, the WL1-estimate is shown to be asymptotically normal at rate n(1/2). The results hinge on two new law of large numbers theorems for bifurcating processes. As an application of the theory, some asymptotic relative efficiency comparisons are made.
机构:
Xi An Jiao Tong Univ, Sch Sci, Dept Stat & Finance, Xian, Peoples R China
Xinjiang Univ, Coll Math & Syst Sci, Dept Stat, Urumqi, Peoples R ChinaXi An Jiao Tong Univ, Sch Sci, Dept Stat & Finance, Xian, Peoples R China
Zhang, Huiguo
Mei, Changlin
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机构:
Xi An Jiao Tong Univ, Sch Sci, Dept Stat & Finance, Xian, Peoples R ChinaXi An Jiao Tong Univ, Sch Sci, Dept Stat & Finance, Xian, Peoples R China
机构:
Univ Free State, Dept Math Stat & Actuarial Sci, POB 339, Bloemfontein, South AfricaUniv Free State, Dept Math Stat & Actuarial Sci, POB 339, Bloemfontein, South Africa