主题：How Labor Force Participation and Health Insurance Coverage Affect Medicare Costs
主讲人： 邓媛元，ARC Centre Excellence in Population Ageing Research (CEPAR)
邓媛元，Ph.D. in Economics, Stony Brook University, stony Brook, NY；Research Fellow, ARC Centre Excellence in Population Ageing Research (CEPAR)
The labor force participation rate of Americans 65 years and older has sharply increased since the mid-1990s. This increase has been accompanied by a growing number of older Americans covered by current employer-provided health insurance plans. For those covered workers, Medicare becomes a secondary payer of their health expenditures, resulting in lower Medicare costs for the system. Additionally, more individuals are delaying their Medicare enrollment when first eligible. Using data from the Medicare Current Beneficiary Survey, we analyze the Medicare costs of individuals around retirement age as a function of their health insurance coverage and labor supply. We also study the evolution of delay enrollments into Medicare, as well as the role of delay enrollment on Medicare costs. Our results show a negative and significant effect of labor supply, insurance coverage types and delay Medicare enrollment on Medicare costs. Using these results, we compute the average aggregate yearly savings linked to individuals working and the Medicare secondary payer effect at around $5.37 billion per year in the 1999-2010 period. We also quantify average aggregate yearly savings of another $10.17 billion per year, in the same time period, resulting from the delays in enrollment into the Medicare system, most of them resulting from our calculations using retrospective Medicare enrollment dates.