Abstract
In this chapter we show that Hadamard differentiability can be used to prove asymptotic efficiency for statistical functionals. Huber (1977) gave a proof that Fréchet differentiable functionals are asymptotically efficient if and only if the influence curve satisfies certain conditions. However he also noted that “the rather stringent regularity conditions — Fréchet differentiability — will rarely be satisfied”. Here we show that Huber’s result holds under the weaker assumption of Hadamard differentiability. Since we have shown that several classes of statistical functionals are Hadamard differentiable, this approach to asymptotic efficiency through Hadamard differentiability has wide applicability.
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© 1983 Springer-Verlag New York Inc.
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Fernholz, L.T. (1983). Asymptotic Efficiency. In: von Mises Calculus For Statistical Functionals. Lecture Notes in Statistics, vol 19. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-5604-5_8
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DOI: https://doi.org/10.1007/978-1-4612-5604-5_8
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-90899-1
Online ISBN: 978-1-4612-5604-5
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