Reflections of David Blackwell on the Work of David Blackwell
summary
Survey of David Blackwell's proofs and legacies emphasizes concrete claims and tools: a simple stopping-time proof of Waldlike identities using the strong law and its converse, Bayesian updating framed around likelihoods, and renewal theory that identifies the stationary excess distribution leading to a patented server staffing algorithm for call centers. Empirical lag between infections and hospitalizations matches that theory, and a Rao-Blackwell variance reduction example shows the usual ratio estimator is biased and improvable.
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