A NOTE ON TUKEY POLYEFFICIENCY
成果类型：
Note
署名作者：
YATRACOS, YG
刊物名称：
BIOMETRIKA
ISSN/ISSBN：
0006-3444
发表日期：
1991
页码：
702703
关键词：
摘要：
The efficiency of an estimate S(n) is usually computed at some underlying distribution. Because it is rare that a real situation can be represented by a single assumed model, Tukey proposed to compute instead the polyefficiency of S(n), that is the infimum of the efficiencies of S(n) at a reasonable collection of distributions called corners. It is shown that high polyefficiency over a finite number of corners, seen as possible distributions of the n dimensional sample, implies at least as high an efficiency at any convex combination of these corners.