Search Results for author: Hengfang Wang

Found 4 papers, 0 papers with code

Mixed Matrix Completion in Complex Survey Sampling under Heterogeneous Missingness

no code implementations6 Feb 2024 Xiaojun Mao, Hengfang Wang, Zhonglei Wang, Shu Yang

Modern surveys with large sample sizes and growing mixed-type questionnaires require robust and scalable analysis methods.

Matrix Completion Nutrition +1

Statistical inference using Regularized M-estimation in the reproducing kernel Hilbert space for handling missing data

no code implementations15 Jul 2021 Hengfang Wang, Jae Kwang Kim

A nonparametric propensity score estimator using the reproducing kernel Hilbert space is also developed by a novel application of the maximum entropy method for the density ratio function estimation.

Imputation regression

Statistical Inference after Kernel Ridge Regression Imputation under item nonresponse

no code implementations29 Jan 2021 Hengfang Wang, Jae-Kwang Kim

The root-n consistency of the imputation estimator is established when a Sobolev space is utilized in the kernel ridge regression imputation, which enables us to develop the proposed variance estimator.

Imputation regression

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