With higher payments and expanded private-plan authority, Medicare Advantage (MA) has caused the market to grow. One in three Medicare beneficiaries with Part D now gets this coverage through MA. Analysis of the sources of and reasons for enrollment growth suggest a troubling report card....

More than a quarter of Medicare beneficiaries are enrolled in Medicare Advantage, which was created in large part to improve the efficiency of health care delivery by promoting competition among private managed care plans. This paper explores the spillover effects of the Medicare Advantage...

Bidding has been proposed to replace or complement the administered prices that Medicare pays to hospitals and health plans. In 2006, the Medicare Advantage program implemented a competitive bidding system to determine plan payments. In perfectly competitive models, plans bid their costs and...