Results 41 to 50 of about 392 (92)

Estimation in high-dimensional linear models with deterministic design matrices [PDF]

open access: yes, 2012
Because of the advance in technologies, modern statistical studies often encounter linear models with the number of explanatory variables much larger than the sample size.
Deng, Xinwei, Shao, Jun
core   +1 more source

Majorization-Minimization algorithms for nonsmoothly penalized objective functions

open access: yes, 2010
The use of penalization, or regularization, has become common in high-dimensional statistical analysis, where an increasingly frequent goal is to simultaneously select important variables and estimate their effects.
E. Schifano, R. Strawderman, M. Wells
semanticscholar   +1 more source

Skellam shrinkage: Wavelet-based intensity estimation for inhomogeneous Poisson data

open access: yes, 2009
The ubiquity of integrating detectors in imaging and other applications implies that a variety of real-world data are well modeled as Poisson random variables whose means are in turn proportional to an underlying vector-valued signal of interest. In this
Hirakawa, Keigo, Wolfe, Patrick J.
core   +2 more sources

Appropriate covariance-specification via penalties for penalized splines in mixed models for longitudinal data

open access: yes, 2010
A popular approach to smooth models for longitudinal data is to express the model as a mixed model, since this often leads to immediate model fitting with standard procedures. This approach is particularly appealing when truncated polynomials are used as
V. Djeundje, I. Currie
semanticscholar   +1 more source

Selecting the number of principal components: estimation of the true rank of a noisy matrix [PDF]

open access: yes, 2015
Principal component analysis (PCA) is a well-known tool in multivariate statistics. One significant challenge in using PCA is the choice of the number of components.
Choi, Yunjin   +2 more
core  

Estimadores compuestos en estadística regional: una aplicación a la estimación de la tasa de variación de la ocupación en la industria [PDF]

open access: yes, 2002
Este trabajo es parte de un proyecto que estudia la aplicación de estimadores compuestos (combinación de estimadores directos e indirectos) para áreas pequeñas en estadística regional.
Costa, Àlex, Satorra, A., Ventura, Eva
core   +1 more source

Adaptive robust variable selection

open access: yes, 2014
Heavy-tailed high-dimensional data are commonly encountered in various scientific fields and pose great challenges to modern statistical analysis. A natural procedure to address this problem is to use penalized quantile regression with weighted $L_1 ...
Barut, Emre   +2 more
core   +1 more source

An extended class of minimax generalized Bayes estimators of regression coefficients

open access: yes, 2008
We derive minimax generalized Bayes estimators of regression coefficients in the general linear model with spherically symmetric errors under invariant quadratic loss for the case of unknown scale. The class of estimators generalizes the class considered
Abramowitz   +11 more
core   +1 more source

Confidence Sets Based on Penalized Maximum Likelihood Estimators in Gaussian Regression

open access: yes, 2010
Confidence intervals based on penalized maximum likelihood estimators such as the LASSO, adaptive LASSO, and hard-thresholding are analyzed. In the known-variance case, the finite-sample coverage properties of such intervals are determined and it is ...
Pötscher, Benedikt M.   +1 more
core   +1 more source

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