Λ-Minimax Estimation of a Multivariate Location Parameter
多元位置参数的 Λ-minimax 估计AI 解读 ↓
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多元位置参数的 Λ-minimax 估计AI 解读 ↓
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The search for a linear Λ-minimax estimate (see, e.g., [19]) of a multivariate location parameter (with quadratic loss) is reduced to a problem of maximizing a continuous function on a compact, convex set—a problem which can be solved numerically with little difficulty. This reduction is accomplished by showing that a minimax theorem applies, thus changing a difficult minimax calculation to a simpler maximin problem. The technique is observed to be applicable to other, related problems. Also considered is the choice of experiment under the assumption that the decision maker can, at some cost, improve the specification of his prior distribution.