"Despite real differences in how the three study countries administer risk adjustments, ... even the sophisticated risk adjustment methods they currently use fail to accurately compensate health plans for the risks represented by specific enrollees.... This study demonstrated the important payment improvements that can be achieved across the board by reinsuring against losses for the small portion of enrollees whose care is grossly undercompensated and suggests this reinsurance will not weaken plan incentives to effectively manage care for these very high cost patients."

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