Paul D. Jacobs, PhD

Off-marketplace plans are widely available, and individuals with higher incomes can obtain silver plans with low premiums off-marketplace.

Relative readmission rates, a measure of care coordination, did not change over time for beneficiaries enrolled in Medicare Advantage and traditional Medicare.

Compared with lower-cost plans, Medicare Advantage enrollees pay more for their plans the longer they remain enrolled.

Using new data, the authors found that consumers in the Medicare Advantage market are fairly insensitive to premiums, but respond more strongly to reduced medical cost sharing.