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Generalized linear mixed models are powerful tools for analyzing clustered data, where the unknown parameters are classically (and most commonly) estimated by the maximum likelihood and restricted maximum likelihood procedures. However,…

统计理论 · 数学 2023-03-23 Andrea M. Bratsberg , Magne Thoresen , Abhik Ghosh

We propose a principal components regression method based on maximizing a joint pseudo-likelihood for responses and predictors. Our method uses both responses and predictors to select linear combinations of the predictors relevant for the…

统计方法学 · 统计学 2021-08-10 Karl Oskar Ekvall

Tensor Factor Models (TFM) are appealing dimension reduction tools for high-order large-dimensional tensor time series, and have wide applications in economics, finance and medical imaging. In this paper, we propose a projection estimator…

统计方法学 · 统计学 2025-03-03 Matteo Barigozzi , Yong He , Lingxiao Li , Lorenzo Trapani

In our paper published earlier we discussed forecasts of earthquake focal mechanism and ways to test the forecast efficiency. Several verification methods were proposed, but they were based on ad-hoc, empirical assumptions, thus their…

地球物理 · 物理学 2015-06-19 Y. Y. Kagan , D. D Jackson

In this paper we focus on the problem of assigning uncertainties to single-point predictions. We introduce a cost function that encodes the trade-off between accuracy and reliability in probabilistic forecast. We derive analytic formula for…

机器学习 · 统计学 2018-03-14 Enrico Camporeale

Under a partially linear models we study a family of robust estimates for the regression parameter and the regression function when some of the predictor variables take values on a Riemannian manifold. We obtain the consistency and the…

统计理论 · 数学 2011-05-26 Guillermo Henry , Daniela Rodriguez

We consider the problem of estimating an unknown function f* and its partial derivatives from a noisy data set of n observations, where we make no assumptions about f* except that it is smooth in the sense that it has square integrable…

机器学习 · 统计学 2024-05-17 Eunji Lim

Over the years, numerous rank estimators for factor models have been proposed in the literature. This article focuses on information criterion-based rank estimators and investigates their consistency in rank selection. The gap conditions…

统计理论 · 数学 2024-07-30 Toshinari Morimoto , Hung Hung , Su-Yun Huang

In this paper we consider the problem of constructing confidence intervals for coefficients of martingale regression models (in particular, time series models) after variable selection. Although constructing confidence intervals are common…

统计理论 · 数学 2020-05-19 Ka Wai Tsang , Wei Dai

Testing procedures for assessing a parametric regression model with circular response and $\mathbb{R}^d$-valued covariate are proposed and analyzed in this work both for independent and for spatially correlated data. The test statistics are…

统计方法学 · 统计学 2020-09-01 Andrea Meilán-Vila , Mario Francisco-Fernández , Rosa M. Crujeiras

We consider the problem of selecting confounders for adjustment from a potentially large set of covariates, when estimating a causal effect. Recently, the high-dimensional Propensity Score (hdPS) method was developed for this task; hdPS…

统计方法学 · 统计学 2021-12-17 Asad Haris , Robert Platt

Kalisch and B\"{u}hlmann (2007) showed that for linear Gaussian models, under the Causal Markov Assumption, the Strong Causal Faithfulness Assumption, and the assumption of causal sufficiency, the PC algorithm is a uniformly consistent…

机器学习 · 统计学 2021-08-03 Shuyan Wang , Peter Spirtes

Many methods of estimating causal models do not provide estimates of confidence in the resulting model. In this work, a metric is proposed for validating the output of a causal model fit; the robustness of the model structure with resampled…

Most machine learning models operate under the assumption that the training, testing and deployment data is independent and identically distributed (i.i.d.). This assumption doesn't generally hold true in a natural setting. Usually, the…

机器学习 · 计算机科学 2021-12-14 Kumud Lakara , Akshat Bhandari , Pratinav Seth , Ujjwal Verma

We study the estimation of a high dimensional approximate factor model in the presence of both cross sectional dependence and heteroskedasticity. The classical method of principal components analysis (PCA) does not efficiently estimate the…

统计方法学 · 统计学 2012-10-01 Jushan Bai , Yuan Liao

This work proposes a new and flexible unreliable failure detector whose output is related to the trust level of a set of processes. By expressing the relevance of each process of the set by an impact factor value, our approach allows the…

分布式、并行与集群计算 · 计算机科学 2014-04-28 Anubis G. M. Rossetto , Cláudio F. R. Geyer , Luciana Arantes , Pierre Sens

In this article, inferences about the multicomponent stress strength reliability are drawn under the assumption that strength and stress follow independent Pareto distribution with different shapes $(\alpha_1,\alpha_2)$ and common scale…

统计理论 · 数学 2024-08-29 Qazi Azhad Jamal , Mohd. Arshad , Nancy Khandelwal

This article examines the limitations of Pearson's correlation in selecting predictor variables for linear models. Using mtcars and iris datasets from R, this paper demonstrates the limitation of this correlation measure when selecting a…

统计方法学 · 统计学 2024-09-10 Mustafa Attallah

In machine learning and pattern recognition, feature selection has been a hot topic in the literature. Unsupervised feature selection is challenging due to the loss of labels which would supply the related information.How to define an…

机器学习 · 计算机科学 2015-01-14 Chang Liu , Yi Xu

We found that a reliability model commonly used to estimate Mean-Time-To-Data-Loss (MTTDL), while suitable for modeling RAID 0 and RAID 5, fails to accurately model systems having a fault-tolerance greater than 1. Therefore, to model the…

分布式、并行与集群计算 · 计算机科学 2013-10-18 Jason Resch , Ilya Volvovski