ASP fits to multi-way layouts

The balanced complete multi-way layout with ordinal or nominal factors is a fundamental data-type that arises in medical imaging, agricultural field trials, DNA microassays, and other settings where analysis of variance (ANOVA) is an established tool. ASP algorithms weigh competing biased fits in or...

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Vydáno v:Annals of the Institute of Statistical Mathematics Ročník 57; číslo 2; s. 201 - 220
Hlavní autor: Beran, Rodolf
Médium: Journal Article
Jazyk:angličtina
Vydáno: Tokyo Springer Nature B.V 01.07.2005
Témata:
Algorithms
Estimating techniques
Estimators
Layouts
Least squares
Mathematical models
Mathematics
Medical imaging
Risk management
Variance analysis
ISSN:0020-3157, 1572-9052
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Shrnutí:The balanced complete multi-way layout with ordinal or nominal factors is a fundamental data-type that arises in medical imaging, agricultural field trials, DNA microassays, and other settings where analysis of variance (ANOVA) is an established tool. ASP algorithms weigh competing biased fits in order to reduce risk through variance-based bias tradeoff. The acronym ASP stands for Adaptive Shrinkage on Penalty bases. Motivating ASP is a penalized least squares criterion that associates a separate quadratic penalty term with each main effect and each interaction in the general ANOVA decomposition of means. The penalty terms express plausible conjecture about the mean function, respecting the difference between ordinal and nominal factors. Multiparametric asymptotics under a probability model and experiments on data elucidate how ASP dominates least squares, sometimes very substantially. ASP estimators for nominal factors recover Stein's superior shrinkage estimators for one- and two-way layouts. ASP estimators for ordinal factors bring out the merits of smoothed fits to multi-way layouts, a topic broached algorithmically in work by Tukey. [PUBLICATION ABSTRACT]
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ISSN:0020-3157
1572-9052
DOI:10.1007/BF02507022