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Let ? be a functional defined on a family of probability measures , containing a subfamily . The paper presents a condition involving the gradient of the functional under which--for probability measures in --"adaptation" is possible, i.e., under which the asymptotic variance bound for estimators...
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Let [theta](n) denote the maximum likelihood estimator of a vector parameter, based on an i.i.d. sample of size n. The class of estimators [theta](n) + n-1 q([theta](n)), with q running through a class of sufficiently smooth functions, is essentially complete in the following sense: For any...
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The asymptotic minimax theorem of LeCam and Hájek is refined by inclusion of terms of order n-1/2. This renders more precise informations about the local properties of superefficient estimator-sequences.
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