Nonparametric Estimation Over Shrinking Neighborhoods: Superefficiency and Adaptation

Loading...
Thumbnail Image
Penn collection
Statistics Papers
Degree type
Discipline
Subject
adaptability
adaptive estimation
shrinking neighborhood
spatially adaptive
superefficiency
wavelets
Statistics and Probability
Funder
Grant number
License
Copyright date
Distributor
Related resources
Author
Cai, T. Tony
Low, Mark G
Contributor
Abstract

A theory of superefficiency and adaptation is developed under flexible performance measures which give a multiresolution view of risk and bridge the gap between pointwise and global estimation. This theory provides a useful benchmark for the evaluation of spatially adaptive estimators and shows that the possible degree of superefficiency for minimax rate optimal estimators critically depends on the size of the neighborhood over which the risk is measured. Wavelet procedures are given which adapt rate optimally for given shrinking neighborhoods including the extreme cases of mean squared error at a point and mean integrated squared error over the whole interval. These adaptive procedures are based on a new wavelet block thresholding scheme which combines both the commonly used horizontal blocking of wavelet coefficients (at the same resolution level) and vertical blocking of coefficients (across different resolution levels).

Advisor
Date Range for Data Collection (Start Date)
Date Range for Data Collection (End Date)
Digital Object Identifier
Series name and number
Publication date
2005-01-01
Journal title
The Annals of Statistics
Volume number
Issue number
Publisher
Publisher DOI
Journal Issue
Comments
Recommended citation
Collection