This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.
Abstract Details
Activity Number:
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649
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Type:
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Invited
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Date/Time:
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Thursday, August 5, 2010 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Nonparametric Statistics
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Abstract - #306149 |
Title:
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Model Selection for Partially Linear Models with Diverging Dimensions
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Author(s):
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Hao Helen Zhang*+
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Companies:
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North Carolina State University
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Address:
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Department of Statistics, Raleigh, NC, 27695, USA
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Keywords:
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semiparametric models ;
smoothing spline ;
shrinkage ;
high dimension ;
oracle ;
variable selection
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Abstract:
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We propose and study a unified procedure for variable selection in partially linear models. A new type of double-penalized least squares is formulated, using the smoothing spline to estimate the nonparametric part and applying a shrinkage penalty on parametric components to achieve model parsimony. Theoretically we show that, with proper choices of the smoothing and regularization parameters, the proposed procedure can be as efficient as the oracle estimator. We also study the asymptotic properties of the estimator when the number of parametric effects diverges with the sample size. Frequentist and Bayesian estimates of the covariance and confidence intervals are derived for the estimators. One great advantage of this procedure is its linear mixed model (LMM) representation, which greatly facilitates its implementation by using standard statistical software.
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Authors who are presenting talks have a * after their name.
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