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Unlock: Shrinkage Estimation and the James-Stein Estimator: Inadmissibility, SURE, and Brown's Characterization

Why the sample mean is inadmissible in three or more dimensions. Stein's identity, the James-Stein estimator and its positive-part refinement, Stein's unbiased risk estimate, Brown's admissibility characterization, the empirical Bayes interpretation, and the link to ridge regression and modern regularization.

102 Prerequisites0 Mastered0 Working92 Gaps
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