Ketcham, Jonathan D. - 2008
We analyze Medicare Part D's net effect on elderly out-of-pocket (OOP) costs and use of prescription drugs using a … dataset containing 1.4 billion prescription records from Wolters Kluwer Health (WKH). These data span the period December 2004 …-2007, Part D reduced elderly OOP costs per day's supply of medication by 21.7%, and increased elderly use of prescription drugs …