The Effect of Medicare Advantage on Hospital Admissions and Mortality

Medicare currently allows beneficiaries to choose between a government-run health plan and a privately- administered program known as Medicare Advantage (MA). Because enrollment in MA is optional, conventional observational estimates of the program's impact are potentially subject to selection bias.美国联邦医疗保险（Medicare）目前允许参保受益人在公立运营健康保险计划与名为联邦医疗保险优势计划（Medicare Advantage, MA）的私人管理项目之间进行选择。由于该项目的参保属于自愿行为，因此针对该项目影响的传统观测性评估可能存在选择偏倚问题。