Dissertation Defense Schedule

Academic Excellence

Sharing original dissertation research is a principle to which the University of Delaware is deeply committed. It is the single most important assignment our graduate students undertake and upon completion is met with great pride.

We invite you to celebrate this milestone by attending their dissertation defense. Please review the upcoming dissertation defense schedule below and join us!

Dissertation Defense Form

Must be received two weeks prior to your defense.

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PROGRAM | Economics

Hysteresis: Evidence from the Social Security Disability Program During the Jobless Recovery

By: Chunling Peng Chair: James Butkiewicz


This paper studies the “hysteresis” in the SSDI (Social Security Disability Insurance) program from 1980 to 2016 by comparing different models using CPS (Current Population Survey) annual data with six million observations. The Social Security Disability Benefits Reform Act of 1984 is used as an exogenous shock to create a unique natural experiment. Using the difference-in-differences with instrumental method and fixed effects, it is shown that demographics, education, marriage, number of children, benefit premium, membership rule and structural shocks are causal to the degree of hysteresis. My findings provide an important implication for the conduct of monetary and fiscal policy.

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The Process


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Dissertation Manual

Wondering how to set up the format for your paper. Refer to the “UD Thesis/Dissertation Manual” for formatting requirements and more.

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Defense Submission Form

This form must be completed two weeks in advance of a dissertation defense to meet the University of Delaware Graduate and Professional Education’s requirements.

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