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dc.contributor.advisor Reiter, Jerome P en_US
dc.contributor.author Deng, Yiting en_US
dc.date.accessioned 2012-05-25T20:09:48Z
dc.date.issued 2012 en_US
dc.identifier.uri http://hdl.handle.net/10161/5442
dc.description Thesis en_US
dc.description.abstract <p>Most panel surveys are subject to missing data problems caused by panel attrition. The Additive Non-ignorable (AN) model proposed by Hirano et al. (2001) utilizes refreshment samples in panel surveys to impute missing data, and offers flexibility in modeling the missing data mechanism to incorporate both ignorable and non-ignorable models. We extend the AN model to settings with three waves and two refreshment samples. We address identication and estimation issues related to the proposed model under four different types of survey design, featured by whether the missingness is monotone and whether subjects in the refreshment samples are followed up in subsequent waves of the survey. We apply this approach and multiple imputation techniques to the 2007-2008 Associated Press-Yahoo! News Poll (APYN) panel dataset to analyze factors affecting people's political interest. We find that, when attrition bias is not accounted for, the carry-on effects of past political interest on current political interest are underestimated. This highlights the importance of dealing with attrition bias and the potential of refreshment samples for doing so.</p> en_US
dc.subject Statistics en_US
dc.subject missing data en_US
dc.subject multiple imputation en_US
dc.subject panel attrition en_US
dc.subject refreshment sample en_US
dc.title Modeling Missing Data In Panel Studies With Multiple Refreshment Samples en_US
dc.type Thesis en_US
dc.department Statistical Science en_US
duke.embargo.months 24 en_US
duke.embargo.release 2014-05-15

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