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- W1985295845 abstract "Abstract Consider a positive exponential family having probability density f ( y | θ ) = u ( y ) β ( θ ) exp ( - y / θ ) , y > 0 , θ > 0 . With suitable values of b and c, the parameter c θ b may denote the mean, the variance or the hazard rate of the probability distribution. In this paper, we study the empirical Bayes estimation of the parameter θ b for any fixed real value b. Two empirical Bayes estimators ϕ ˜ n and ϕ n * are constructed according to the prior information about the parameter space Ω = ( 0 , ∞ ) or Ω = ( θ 1 , θ 2 ) , where 0 θ 1 θ 2 ∞ are known constants. The asymptotic optimality of the proposed empirical Bayes estimators is investigated. The rates of convergence of the associated regrets are established. It has been shown that under certain conditions, ϕ ˜ n is asymptotically optimal, having rates of convergence O ( ( ln n ) 2 ( λ s - 2 ) / λ s / n ( λ s - 2 ) / λ s ) or O ( ( ln 2 n ) ( 1 - b ) λ - 1 / 2 s / n ( λ s - 2 ) / 2 s ) , depending on b > 0 or b 0 where s > 2 and λ is positive number such that 2 / s λ 2 ( 1 - 1 / s ) ; and ϕ n * is asymptotically optimal, having rates of convergence O ( ln 2 n / n ) or O ( ( ln n ) 2 ( 1 - b ) + 1 / n ) , depending on b > 0 or b 0 ." @default.
- W1985295845 created "2016-06-24" @default.
- W1985295845 creator A5074747642 @default.
- W1985295845 date "2009-02-01" @default.
- W1985295845 modified "2023-09-26" @default.
- W1985295845 title "Empirical Bayes estimation of in positive exponential families" @default.
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- W1985295845 doi "https://doi.org/10.1016/j.jspi.2008.05.003" @default.
- W1985295845 hasPublicationYear "2009" @default.
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