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- W3139927404 abstract "We establish statistical properties of random-weighting methods in LASSO regression under different regularization parameters λn and suitable regularity conditions. The random-weighting methods in view concern repeated optimization of a randomized objective function, motivated by the need for computationally efficient uncertainty quantification in contemporary estimation settings. In the context of LASSO regression, we repeatedly assign analyst-drawn random weights to terms in the objective function, and optimize to obtain a sample of random-weighting estimators. We show that existing approaches have conditional model selection consistency and conditional asymptotic normality at different growth rates of λn as n→∞. We propose an extension to the available random-weighting methods and establish that the resulting samples attain conditional sparse normality and conditional consistency in a growing-dimension setting. We illustrate the proposed methodology using synthetic and benchmark data sets, and we discuss the relationship of the results to approximate nonparametric Bayesian analysis and to perturbation bootstrap methods." @default.
- W3139927404 created "2021-04-13" @default.
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- W3139927404 date "2022-01-01" @default.
- W3139927404 modified "2023-09-26" @default.
- W3139927404 title "Random weighting in LASSO regression" @default.
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- W3139927404 doi "https://doi.org/10.1214/22-ejs2020" @default.
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