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Bayesian Models for Imputing Missing Data and Editing Erroneous Responses in Surveys

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Date
2019
Author
Akande, Olanrewaju Michael
Advisor
Reiter, Jerome P
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Abstract

This thesis develops Bayesian methods for handling unit nonresponse, item nonresponse, and erroneous responses in large scale surveys and censuses containing categorical data. I focus on applications to nested household data where individuals are nested within households and certain combinations of the variables are not allowed, such as the U.S. Decennial Census, as well as surveys subject to both unit and item nonresponse, such as the Current Population Survey.

The first contribution is a Bayesian model for imputing plausible values for item nonresponse in data nested within households, in the presence of impossible combinations. The imputation is done using a nested data Dirichlet process mixture of products of multinomial distributions model, truncated so that impossible household configurations have zero probability in the model. I show how to generate imputations from the Markov Chain Monte Carlo sampler, and describe strategies for improving the computational efficiency of the model estimation. I illustrate the performance of the approach with data that mimic the variables collected in the U.S. Decennial Census. The results indicate that my approach can generate high quality imputations in such nested data.

The second contribution extends the imputation engine in the first contribution to allow for the editing and imputation of household data containing faulty values. The approach relies on a Bayesian hierarchical model that uses the nested data Dirichlet process mixture of products of multinomial distributions as a model for the true unobserved data, but also includes a model for the location of errors, and a reporting model for the observed responses in error. I illustrate the performance of the edit and imputation engine using data from the 2012 American Community Survey. I show that my approach can simultaneously estimate multivariate relationships in the data accurately, adjust for measurement errors, and respect impossible combinations in estimation and imputation.

The third contribution is a framework for using auxiliary information to specify nonignorable models that can handle both item and unit nonresponse simultaneously. My approach focuses on how to leverage auxiliary information from external data sources in nonresponse adjustments. This method is developed for specifying imputation models so that users can posit distinct specifications of missingness mechanisms for different blocks of variables, for example, a nonignorable model for variables with auxiliary marginal information and an ignorable model for the variables exclusive to the survey.

I illustrate the framework using data on voter turnout in the Current Population Survey.

The final contribution extends the framework in the third contribution to complex surveys, specifically, handling nonresponse in complex surveys, such that we can still leverage auxiliary data while respecting the survey design through survey weights. Using several simulations, I illustrate the performance of my approach when the sample is generated primarily through stratified sampling.

Description
Dissertation
Type
Dissertation
Department
Statistical Science
Subject
Statistics
Census
Measurement Error
Missing Data
Multiple Imputation
Survey Nonresponse
Survey Weights
Permalink
https://hdl.handle.net/10161/18766
Citation
Akande, Olanrewaju Michael (2019). Bayesian Models for Imputing Missing Data and Editing Erroneous Responses in Surveys. Dissertation, Duke University. Retrieved from https://hdl.handle.net/10161/18766.
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This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.

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