Showing 1 - 10 of 1,655
Forecasts from dynamic factor models potentially benefit from refining the data set by eliminating uninformative series. The paper proposes to use prediction weights as provided by the factor model itself for this purpose. Monte Carlo simulations and an empirical application to short-term...
Persistent link: https://www.econbiz.de/10011605938
avoiding the overshrinkage of a Lasso-type estimator. It combines the idea of the VISA algorithm which avoids the overshrinkage … problem of regression coefficients and those of the Lasso-type estimators, based on ℓ1+ℓ2 penalty, that overcome the … limitation of the grouping effect of Lasso in high dimension. It is based on a modified VISA algorithm, so it is also …
Persistent link: https://www.econbiz.de/10011056435
In this paper we develop statistical models for bankruptcy prediction of Italian firms in the limited liability sector, using annual balance sheet information. Several issues involved in default risk analysis are investigated, such as the structure of the data-base, the sampling procedure and...
Persistent link: https://www.econbiz.de/10010860336
with Bayesian Markov Chain Monte Carlo. The resulting model is equivalent to the frequentist lasso procedure. A … covariates is provided by the approach. An implementation of the lasso procedure for binary quantile regression models is …
Persistent link: https://www.econbiz.de/10010847927
We propose the Bayesian adaptive Lasso (BaLasso) for variable selection and coefficient estimation in linear regression … hierarchical Bayesian interpretation of the Lasso. Our formulation also permits prediction using a model averaging strategy. We …
Persistent link: https://www.econbiz.de/10010848666
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
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
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
selection operator (LASSO), this approach sets certain regression coefficients exactly to zero, thus performing variable … selection. However, such a framework, contrary to the LASSO, has never been used in regression models for survival data with …
Persistent link: https://www.econbiz.de/10010745019
(automatic general-to-specific selection) and LASSO (?1-norm regularization). In a simulation study, we show the performance of …
Persistent link: https://www.econbiz.de/10010720623