Efficiency and superefficiency in one-parameter two-sided truncated distribution families

摘要

whereθis an unknown parameter, φ(θ) is a continuous differentiable function such that θφ(θ), s(θ)=dφ(θ)/dθ0, θ∈R, and f(x;θ) is a positive continuous density func-tion on [θ,φ(θ)]. The one-parameter two-sided truncated distribution families (1)