AJMC April 25, 2023
Increases in Medicare Advantage market share over the past 10 years are largely caused by an increased preference for managed care among Medicare beneficiaries.
ABSTRACT
Objectives: Private managed care plans in the Medicare Advantage (MA) program have been gaining market share relative to traditional fee-for-service Medicare (TM), yet there are no obvious structural changes to Medicare that would explain this growth. Our goal is to explain the growth in MA market share during a period when it increased dramatically.
Study Design: Data are drawn from a representative sample of the Medicare population from 2007 to 2018.
Methods: We decomposed MA growth into changes in the values of explanatory variables that influence MA enrollment (eg, income and payment rate)...
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