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This paper consider penalized empirical loss minimization of convex loss functions with unknown non-linear target functions. Using the elastic net penalty we establish a finite sample oracle inequality which bounds the loss of our estimator from above with high probability. If the unknown target...
Persistent link: https://www.econbiz.de/10010851265
This paper establishes non-asymptotic oracle inequalities for the prediction error and estimation accuracy of the LASSO … in stationary vector autoregressive models. These inequalities are used to establish consistency of the LASSO even when … excluded. Next, non-asymptotic probabilities are given for the Adaptive LASSO to select the correct sign pattern (and hence the …
Persistent link: https://www.econbiz.de/10010851258
the estimation error of the Lasso under two different sets of conditions on the covariates as well as the error terms … constants. These results are then used to show that the Lasso can be consistent in even very large models where the number of … regressors increases at an exponential rate in the sample size. Conditions under which the Lasso does not discard any relevant …
Persistent link: https://www.econbiz.de/10010851282
parameters with the Lasso and the adaptive Lasso. The parsimonious random walk allows the parameters to be modelled non … randomly.We characterize the finite sample properties of the Lasso by deriving upper bounds on the estimation and prediction … probability tending to one.We also provide conditions under which the adaptive Lasso is able to achieve perfectmodel selection. We …
Persistent link: https://www.econbiz.de/10011252640
We establish oracle inequalities for a version of the Lasso in high-dimensional fixed effects dynamic panel data models …
Persistent link: https://www.econbiz.de/10011115312
Non-standard distributional approximations have received considerable attention in recent years. They often provide more accurate approximations in small samples, and theoretical improvements in some cases. This paper shows that the seemingly unrelated "?many instruments asymptotics" ?and...
Persistent link: https://www.econbiz.de/10009421714
to the problem by using the LASSO as a variable selection method to choose between the possible variables and thus obtain …
Persistent link: https://www.econbiz.de/10010851192
We study the asymptotic properties of the Adaptive LASSO (adaLASSO) in sparse, high-dimensional, linear time …
Persistent link: https://www.econbiz.de/10010851219
individual specific variables that all could potentially impact the retirement decision.We use variants of the Lasso and the … adaptive Lasso applied to logistic regression in order to uncover determinants of the retirement decision. To the best of our …
Persistent link: https://www.econbiz.de/10010851260
autoregressive models. We propose using Lasso-type estimators to reduce the dimensionality to a manageable one and provide strong …
Persistent link: https://www.econbiz.de/10011079278