Erik Torgersen (1991), Cambridge University Press — DOI-10.1017/CBO9780511666353
Key takeaways
Filed, not read. From the publisher’s description and the public chapter openings only: the book asks when one experiment yields more information than another, how to measure the difference, and how fast information accumulates under repetition. It builds on Wald, Blackwell and Le Cam through risk and deficiency, with chapters on convex analysis, game and decision theory and vector lattices, and relates deficiency to sufficiency, randomisation, distance, ordering, equivalence, completeness and convergence. The preface names the line it collects: Blackwell, Bohnenblust, Shapley, Sherman and Stein (1949–1953) for the criteria of being more informative, Boll (1955) on invariance, Strassen (1965) on the dilation criterion, and Le Cam (1959, 1964) on deficiency, which it says has interpretations through pointwise risks, maximum risks, performance functions, Bayes risk and randomizations. The opening of the chapter on deficiencies calls deficiency “the single most important concept in this work”. LIT-781 is the 1953 paper it extends, read as NOTE-595.
Standing in the record
Filed on 2026-10-09 at the owner’s request, as one of the works in the reference list of the owner’s working manuscript (October 2026) that the record did not yet hold. See the curation entry of that day.