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Analysis of failure time data with missing and informative auxiliary covariates.
Title
Analysis of failure time data with missing and informative auxiliary covariates.
Author
Ghosh, Lipika
Date Created
2011
Subjects--Topical
Statistics, Mathematics, Biometry
Description
In this dissertation we use Cox's regression model to failure time data with continuous informative auxiliary variables in the presence of a validation subsample. The work is motivated by a common problem of missing or mismeasured covariates in su...
Generalized semiparametric varying-coefficient models for longitudinal data
Title
Generalized semiparametric varying-coefficient models for longitudinal data
Author
Qi, Li
Date Created
2015
Subjects--Topical
Mathematics, Statistics, Biometry
Description
In this dissertation, we investigate the generalized semiparametric varying-coefficient models for longitudinal data that can flexibly model three types of covariate effects: time-constant effects, time-varying effects, and covariate-varying effec...
Improving Semiparametric Estimation of Longitudinal Data with Covariance Function
Title
Improving Semiparametric Estimation of Longitudinal Data with Covariance Function
Author
Fang, Fang
Date Created
2018
Subjects--Topical
Mathematics, Statistics, Biometry
Description
In this dissertation, we aim to improve efficiency of estimation in longitudinal data under generalized semi-parametric varying-coefficient models.First, we investigate a profile weighted least square approach for model estimation by utilizing wit...