As part of the Canadian Centre for Health Economics (CCHE) Friday Health Economics Series, we welcome Douglas Barthold this Friday November 21st, 10am – 12pm in HS100 (Health Sciences Building 155 College Street). Douglas will explore “The Effects of Prescription Drug Cost Sharing on Preventable Hospitalizations: Evidence from the Medicare Modernization Act.”
Douglas Barthold is an Economics Doctoral Candidate at McGill University, and a CCHE fellow. His research interests are broad, and currently focus on the effects of health insurance on health care utilization, and on health outcomes and inequalities. Other current research interests include the role of health and health policies in the intergenerational transmission of socioeconomic status. Past research has evaluated the effects of diabetes on continued labour market participation, and he has also worked on gender-related health system equity.
This study assesses the impact of reductions in cost sharing for prescription drugs on preventable hospitalizations and outpatient care utilization among the elderly in the United States. In addition to affecting demand for drugs, drug cost sharing can also affect the demand for complement services, such as primary or preventive care. In order to evaluate this possibility, I analyze the effects of varying patient cost sharing for prescription drugs on hospitalizations from ambulatory care sensitive conditions (ACSC), which can represent a failure of preventive and outpatient care. To address endogeneity from selection and sorting of individuals into insurance plans, I aggregate data from the 2000-2009 Medical Expenditure Panel Survey (MEPS) to the region-year level, and use an instrumental variables strategy. The analysis exploits exogenous variation in prescription drug cost sharing that occurred as a result of the Medicare Modernization Act of 2003, and therefore plausibly identifies causal effects of cost sharing. Results show that for the elderly in the United States, who have generous insurance coverage for other outpatient services, reductions in prescription drug cost sharing do not have an effect on hospitalizations related to ambulatory care sensitive conditions, or on specific types of preventive care utilization.
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