Alexander Goldenshluger

  1. Bandwidth selection in kernel density estimation: oracle inequalities and adaptive minimax optimality.

    Authors: Alexander Goldenshluger, Oleg Lepski
    Subjects: Statistics
    Abstract

    We address the problem of density estimation with $\bL_p$--loss by selection
    of kernel estimators. We develop a selection procedure and derive
    corresponiding $\bL_p$--risk oracle inequalities. It is shown that the proposed
    selection rule leads to the minimax estimator that is adaptive over a scale of
    the anisotropic Nikol'ski classes. The main technical tools used in our
    derivations are uniform bounds on the $\bL_p$--norms of empirical processes
    developed recently in Goldenshluger and Lepski~(2010).

  2. Woodroofe's one-armed bandit problem revisited.

    Authors: Alexander Goldenshluger, Assaf Zeevi
    Subjects: Probability
    Abstract

    We consider the one-armed bandit problem of Woodroofe [J. Amer. Statist.
    Assoc. 74 (1979) 799--806], which involves sequential sampling from two
    populations: one whose characteristics are known, and one which depends on an
    unknown parameter and incorporates a covariate. The goal is to maximize
    cumulative expected reward. We study this problem in a minimax setting, and
    develop rate-optimal polices that involve suitable modifications of the myopic
    rule.

  3. Woodroofe's one-armed bandit problem revisited.

    Authors: Alexander Goldenshluger, Assaf Zeevi
    Subjects: Probability
    Abstract

    We consider the one-armed bandit problem of Woodroofe [J. Amer. Statist.
    Assoc. 74 (1979) 799--806], which involves sequential sampling from two
    populations: one whose characteristics are known, and one which depends on an
    unknown parameter and incorporates a covariate. The goal is to maximize
    cumulative expected reward. We study this problem in a minimax setting, and
    develop rate-optimal polices that involve suitable modifications of the myopic
    rule.

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