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- W3149057051 abstract "We study the asymptotic properties of the Adaptive LASSO (adaLASSO) in sparse, high-dimensional, linear time-series models. We assume that both the number of covariates in the model and the number of candidate variables can increase with the sample size (polynomially orgeometrically). In other words, we let the number of candidate variables to be larger than the number of observations. We show the adaLASSO consistently chooses the relevant variables as the number of observations increases (model selection consistency) and has the oracle property, even when the errors are non-Gaussian and conditionally heteroskedastic. This allows the adaLASSO to be applied to a myriad of applications in empirical finance and macroeconomics. A simulation study shows that the method performs well in very general settings with t-distributed and heteroskedastic errors as well with highly correlated regressors. Finally, we consider an application to forecast monthly US inflation with many predictors. The model estimated by the adaLASSO delivers superior forecasts than traditional benchmark competitors such as autoregressive and factor models." @default.
- W3149057051 created "2021-04-13" @default.
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- W3149057051 date "2015-01-01" @default.
- W3149057051 modified "2023-09-23" @default.
- W3149057051 title "l1-Regularization of High-Dimensional Time-Series Models with Flexible Innovations" @default.
- W3149057051 hasPublicationYear "2015" @default.
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