The Affordable Care Act calls for significant cuts in reimbursements to insurers providing Medicare Advantage (MA) coverage, which has been the most popular alternative to traditional fee-for-service Medicare. Opponents of these cuts argue that they carry serious negative repercussions for seniors, and have lobbied successfully to force their postponement. But research coming out of the Wharton School suggests that cuts to MA reimbursements actually are unlikely to harm consumer welfare.