A general Akaike-type criterion for model selection in robust regression |
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Authors: | BURMAN P; NOLAN D |
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Institution: | Division of Statistics, University of California Davis, California 95616, U.S.A.
Statistics Department, University of California Berkeley, California 94720, U.S.A. |
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Abstract: | Akaike's procedure (1970) for selecting a model minimises anestimate of the expected squared error in predicting new, independentobservations. This selection criterion was designed for modelsfitted by least squares. A different model-fitting technique,such as least absolute deviation regression, requires an appropriatemodel selection procedure. This paper presents a general Akaike-typecriterion applicable to a wide variety of loss functions formodel fitting. It requires only that the function be convexwith a unique minimum, and twice differentiable in expectation.Simulations show that the estimators proposed here well approximatetheir respective prediction errors. |
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Keywords: | Huber function Least absolute deviation Prediction error Quantile regression |
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