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Simultaneous Confidence Bands for Penalized Spline Estimators

Simultaneous Confidence Bands for Penalized Spline Estimators In this article we construct simultaneous confidence bands for a smooth curve using penalized spline estimators. We consider three types of estimation methods: (a) as a standard (fixed effect) nonparametric model, (b) using the mixed-model framework with the spline coefficients as random effects, and (c) a full Bayesian approach. The volume-of-tube formula is applied for the first two methods and compared with Bayesian simultaneous confidence bands from a frequentist perspective. We show that the mixed-model formulation of penalized splines can help obtain, at least approximately, confidence bands with either Bayesian or frequentist properties. Simulations and data analysis support the proposed methods. The R package ConfBands accompanies the article. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the American Statistical Association Taylor & Francis

Simultaneous Confidence Bands for Penalized Spline Estimators

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References (44)

Publisher
Taylor & Francis
Copyright
© 2010 American Statistical Association
ISSN
1537-274X
eISSN
0162-1459
DOI
10.1198/jasa.2010.tm09165
Publisher site
See Article on Publisher Site

Abstract

In this article we construct simultaneous confidence bands for a smooth curve using penalized spline estimators. We consider three types of estimation methods: (a) as a standard (fixed effect) nonparametric model, (b) using the mixed-model framework with the spline coefficients as random effects, and (c) a full Bayesian approach. The volume-of-tube formula is applied for the first two methods and compared with Bayesian simultaneous confidence bands from a frequentist perspective. We show that the mixed-model formulation of penalized splines can help obtain, at least approximately, confidence bands with either Bayesian or frequentist properties. Simulations and data analysis support the proposed methods. The R package ConfBands accompanies the article.

Journal

Journal of the American Statistical AssociationTaylor & Francis

Published: Jun 1, 2010

Keywords: B-spline; Bayesian penalized spline; Confidence band; Mixed model; Penalization

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