In 2006, Medicare Part D transitioned prescription drug coverage for dual-eligible nursing home residents from Medicaid to Medicare and randomly assigned them to Part D prescription drug plans (PDPs). Because PDPs may differ in coverage, residents’ assigned plans may be relatively more or less restrictive for drugs they take. Taking advantage of the fact that randomization mitigates potential selection bias common in observational studies, this study seeks to assess the impact of PDP coverageon resident outcomes for three medication classes – antidepressants, antipsychotics, and cholinesterase inhibitors
