Semiparametric estimation in generalized additive partial linear models with nonignorable nonresponse data

Jierui Du () and Xia Cui ()
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Jierui Du: Guangzhou University
Xia Cui: Guangzhou University

Statistical Papers, 2024, vol. 65, issue 5, No 23, 3235-3259

Abstract: Abstract We address the semiparametric challenge of identifying and estimating generalized additive partial linear models with nonignorable missingness in the response. Identifiability is ensured under instrumental variable assumption that there is an instrumental covariate related to the prospensity but unrelated to the response variable, or the assumption that the conditional score function is linear in the response variable. We propose a new estimating equation for the prospensity by taking expectation of the unobservable part on a linear combination of all covariates rather than the covariates themselves. This estimating equation does not suffer from the typical curse of dimensionality. Then the unknown nonparametric function is approximated by polynomial spline basis functions and we construct estimating equations for mean of response based on the inverse probability weighting. Under some regular conditions, we establish asymptotic normality of the proposed estimators for parametric components and consistency of the estimators of nonparametric functions. Simulation studies demonstrate that the proposed inference procedure performs well in many settings. The proposed method is applied to analyze the household income dataset from the Chinese Household Income Project Survey 2013.

Keywords: Generalized additive partial linear models; Nonignorable missingness; Identifiability; Instrumental variable; Asymptotic normality; 62D10; 62G08 (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s00362-023-01522-0

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