We propose a two-step estimating procedure for generalized additive partially linear models with clustered data using estimating equations. Our proposed method applies to the case that the number of observations per cluster is allowed to increase with the number of independent subjects. We establish oracle properties for the two-step estimator of each function component such that it performs as well as the univariate function estimator by assuming that the parametric vector and all other function components are known. Asymptotic distributions and consistency properties of the estimators are obtained. Finite-sample experiments with both simulated continuous and binary response variables confirm the asymptotic results. We illustrate the methods with an application to a U.S. unemployment data set.
Copula based generalized additive models with non-random sample selection
非随机样本选择在许多实证研究中是常见的,并且当感兴趣的输出变量仅可用于数据的受限非随机子样本时出现。我们引入了广义加性模型的一个扩展,它通过使用选择方程来考虑非随机样本选择。所提出的方法允许不同的分布的结果变量,各种依赖结构之间的(结果和选择)方程,通过使用copulae,和非参数效应的反应。参数估计是在惩罚似然和联立方程框架内进行的。我们建立了所提出的惩罚样条估计的渐近理论,这扩展了广义可加模型中惩罚样条的最新理论结果,例如Kauermann et al.(2009)和Yoshida & Naito(2014)。通过仿真研究证明了该方法的经验有效性。
Latent growth curve models with spline functions are flexible and accessible statistical tools for investigating nonlinear change patterns that exhibit distinct phases of development in manifested variables. Among such models, the bilinear spline growth model (BLSGM) is the most straightforward and intuitive but useful. An existing study has demonstrated that the BLSGM allows the knot (or change-point), at which two linear segments join together, to be an additional growth factor other than the intercept and slopes so that researchers can estimate the knot and its variability in the framework …
The Generalized Additive Model (GAM) is a powerful tool and has been well studied. This model class helps to identify additive regression structure. Via available test procedures one may identify the regression structure even sharper if some component functions have parametric form. The Generalized Additive Partially Linear Models (GAPLM) enjoy the simplicity of the GLM and the flexibility of the GAM because they combine both parametric and nonparametric components. We use the hybrid spline-backfitted kernel estimation method, which combines the best features of both spline and kernel methods …
Nonparametric Density Estimation for Data Scattered on Irregular Spatial Domains: A Likelihood-Based Approach Using Bivariate Penalized Spline Smoothing
Bayesian power spectral density estimation for LISA noise based on penalized splines with a parametric boost
The University of Auckland(奥克兰大学);Auckland University of Technology(奥克兰理工大学);Université Côte d’Azur, Observatoire de la Côte d’Azur, Artemis, CNRS(蔚蓝海岸大学,蔚蓝海岸天文台,Artemis,法国国家科学研究中心)
In many complex applications, data heterogeneity and homogeneity exist simultaneously. Ignoring either one will result in incorrect statistical inference. In addition, coping with complex data that are non-Euclidean becomes more common. To address these issues we consider a distributional data response additive model in which the response is a distributional density function and the individual effect curves are homogeneous within a group but heterogeneous across groups, the covariates capturing the variation share common additive bivariate functions. A transformation approach is first utilized…
Recently the shape-restricted inference has gained popularity in statistical and econometric literature in order to relax the linear or quadratic covariate effect in regression analyses. The typical shape-restricted covariate effect includes monotonic increasing, decreasing, convexity or concavity. In this paper, we introduce the shape-restricted inference to the celebrated Cox regression model (SR-Cox), in which the covariate response is modeled as shape-restricted additive functions. The SR-Cox regression approximates the shape-restricted functions using a spline basis expansion with data dr…
Efficient Poisson Subsampling for the Partially Linear Additive Cox Model
Nankai University(南开大学);Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院);University of Chinese Academy of Sciences(中国科学院大学);Changchun University of Technology(长春工业大学);Liaoning University(辽宁大学);University of Connecticut(康涅狄格大学);Tianjin University(天津大学)
Splunk(斯邦克);University of Southern California(南加州大学)
Mixed linear regression (MLR) model is among the most exemplary statistical tools for modeling non-linear distributions using a mixture of linear models. When the additive noise in MLR model is Gaussian, Expectation-Maximization (EM) algorithm is a widely-used algorithm for maximum likelihood estimation of MLR parameters. However, when noise is non-Gaussian, the steps of EM algorithm may not have closed-form update rules, which makes EM algorithm impractical. In this work, we study the maximum likelihood estimation of the parameters of MLR model when the additive noise has non-Gaussian distrib…