How do low-income enrollees in the affordable care act marketplaces respond to cost sharing?


Lavetti, Kurt ; DeLeire, Thomas C. ; Ziebarth, Nicolas R.


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URN: urn:nbn:de:bsz:180-madoc-663478
Document Type: Working paper
Year of publication: 2023
The title of a journal, publication series: ZEW Discussion Papers
Volume: 23-049
Place of publication: Mannheim
Publication language: English
Institution: School of Law and Economics > Arbeitsmärkte und Sozialversicherungen (Ziebarth 2022-)
Sonstige Einrichtungen > ZEW - Leibniz-Zentrum für Europäische Wirtschaftsforschung
MADOC publication series: Veröffentlichungen des ZEW (Leibniz-Zentrum für Europäische Wirtschaftsforschung) > ZEW Discussion Papers
Subject: 330 Economics
Classification: JEL: H24 , H41 , H43 , H51 , I11 , I18 , J32 , J33 , J68,
Keywords (English): demand elasticities , health insurance , moral hazard , ACA , marketplaces , AV-variants , low-value care , lifestyle drugs , value-based CSRs , Utah
Abstract: The Affordable Care Act requires insurers to offer cost sharing reductions (CSRs) to low-income consumers on the Marketplaces. We link 2013-2015 All-Payer Claims Data to 2004-2013 administrative hospital discharge data from Utah and exploit policy-driven differences in the actuarial value of CSR plans that are solely determined by income. This allows us to examine the effect of cost sharing on medical spending among low-income individuals. We find that enrollees facing lower levels of cost sharing have higher levels of health care spending, controlling for past health care use. We estimate demand elasticities of total health care spending among this low-income population of approximately -0.12, suggesting that demand-side price mechanisms in health insurance design work similarly for low-income and higher-income individuals. We also find that cost sharing subsidies substantially lower out-of-pocket medical care spending, showing that the CSR program is a key mechanism for making health care affordable to low-income individuals




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