The Impact of Medicare Part D on Emergency Department Visits
研究了2006年实施的医疗保险D部分（处方药覆盖）对老年人急诊就诊的影响，发现非急诊就诊减少，而急诊就诊未变，表明该计划可能改善了健康管理并减少了不必要的急诊使用。
The Medicare Part D program introduced prescription drug coverage for seniors in 2006. We examine the impact of this program on the use of emergency department (ED) care. Using a difference-in-differences model, we find declines in the number of ED visits for non-emergency care but not for emergency care, suggesting that Part D may have led to better management of health and reduced unnecessary use of EDs. Copyright © 2016 John Wiley & Sons, Ltd.