Jing (Gina) Li
Job Market Candidate

Stanford University
Department of Economics
579 Jane Stanford Way
Stanford, CA 94305
ginali@stanford.edu

I am on the job market in the 2022-2023 academic year.

Curriculum Vitae

Primary Field:
Health Economics, Public Economics

Secondary field:
Labor Economics

Expected Graduation Date:
June, 2023

Thesis Committee:
Mark Duggan (Co-Primary):
mgduggan@stanford.edu

Liran Einav (Co-Primary):
leinav@stanford.edu

Maya Rossin-Slater:
mrossin@stanford.edu

Working Papers

Becoming Dual: Measuring the Impact of Gaining Medicaid Coverage for Medicare Beneficiaries
(Job Market Paper)

I study the effect of having dual public health insurance coverage on healthcare utilization among US patients. Specifically, I focus on Medicare beneficiaries who gain additional Medicaid coverage, which eliminates out-of-pocket costs for healthcare services. While the lower cost may increase patients' demand for healthcare, I identify a countervailing force: providers are less willing to treat Medicaid patients due to lower reimbursement rates and higher administrative burdens. Using administrative Medicare claims data and variation from a substantial expansion in dual-Medicaid eligibility in the state of Connecticut, I find that dual enrollment increases total patients' health care utilization by 51 percent, and that much of this increase is driven by a higher use of the emergency department (83 percent increase at the sample mean). At the same time, dual enrollment leads to a 24 percent decline in the number of outpatient physician visits, especially for preventive care. I demonstrate that the decline in outpatient care is concentrated among providers with a low share of Medicaid patients. My findings thus demonstrate the unintended consequences of policies that increase enrollment in dual-Medicaid among patients without changing provider side constraints regarding their willingness to treat Medicaid patients. More broadly, my results speak to the role of the interaction between Medicare and Medicaid--the two primary public health insurance programs in the US--in driving access to care and healthcare spending.


The Effect of Changes in Social Security Delayed Retirement Credit: Evidence from Administrative Data
(with Mark Duggan, Irena Dushi, Sookyo Jeong),
Revise and Resubmit at Journal of Public Economics

The delayed retirement credit (DRC) increases monthly OASI (Old Age and Survivors Insurance) benefits for primary beneficiaries who claim after their full retirement age (FRA). For many years, the DRC was set at 3.0 percent per year (0.25 percent monthly). The 1983 amendments to Social Security more than doubled this actuarial adjustment to 8.0 percent per year. These changes were phased in gradually, so that those born in 1924 or earlier retained a 3.0 percent DRC while those born in 1943 or later had an 8.0 percent DRC. In this paper, we use administrative data from the Social Security Administration (SSA) to estimate the effect of this policy change on individual claiming behavior. We focus on the first half of the DRC increase (from 3.0 to 5.5 percent) given changes in other SSA policies that coincided with the later increases. Our findings demonstrate that the increase in the DRC led to a significant increase in delayed claiming of social security benefits and strongly suggest that the effects were larger for those with higher lifetime incomes, who would have a greater financial incentive to delay given their longer life expectancies.


Publications and Forthcoming


Working to Care or Caring to Work: The Intra-Family Dynamics of Health Shocks
(with Gonzalo R. Arrieta), Accepted at American Journal of Health Economics

We seek to understand how the labor market decisions of the family adjust in response to plausibly exogenous health shocks. Family members might seek to work less to provide caregiving or work more in response to medical expenditures and loss of income by the ill individual. We use records of emergency department (ED) visits and hospitalizations to empirically determine the size of these effects. Using ED events we find evidence of intra-family insurance. By exploring how insurance varies by the severity of the health shock, we find evidence that family labor supply responses decrease as the caregiving need increases.


The Effects of the Affordable Care Act on the Near-Elderly: Evidence for Health Insurance Coverage and Labor Market Outcomes
(with Mark Duggan and Gopi Shah Goda). 2021. Tax Policy and the Economy, 35(1), 179-223

The Affordable Care Act (ACA) not only changed the landscape of health insurance coverage in the United States, but also affected the relationship between working decisions and health insurance. In this paper, we estimate the impact of the ACA on the near-elderly (ages 60- 64) in the five years after the implementation of its key provisions in early 2014. We exploit variation across geographic areas in the pre-existing level of uninsurance and use 65-69 year olds, whose insurance coverage was unaffected by the ACA, as a within-region control group. Our findings indicate that the ACA increased health insurance coverage among the near elderly by 4.5 percentage points and reduced their labor force participation rate by 0.6 percentage points.