Dominated choices and Medicare Advantage enrollment

Area of Science:

• Behavioral Economics
• Health Policy
• Decision Science

Background:

• Behavioral economics identifies decision errors linked to complex choices or repeated decisions.
• Medicare beneficiaries face enrollment choices between Traditional Medicare (TM) and Medicare Advantage (MA) plans.
• During 2007-2010, MA private fee-for-service (PFFS) plans offered superior benefits without network restrictions compared to TM.

Purpose of the Study:

• To investigate Medicare beneficiary enrollment decisions in the Medicare Advantage (MA) program.
• To analyze the influence of status quo bias on enrollment patterns between TM and MA plans.

Main Methods:

• Analysis of Medicare beneficiary enrollment data from 2007-2010.
• Comparison of enrollment rates between new Medicare beneficiaries and incumbents.
• Statistical examination of factors influencing MA plan selection.

Main Results:

• Despite PFFS plans being a dominated choice over TM, over 75% of beneficiaries remained in TM.
• MA enrollment rates were notably higher among individuals newly eligible for Medicare compared to long-term beneficiaries.
• Status quo bias was identified as a significant factor in enrollment decisions.

Conclusions:

• Status quo bias plays a critical role in Medicare beneficiary enrollment decisions.
• The initial choice environment significantly impacts long-term enrollment patterns in Medicare.
• Understanding behavioral biases is crucial for designing effective health insurance enrollment processes.