336,460
Participants
Start Date
April 30, 2015
Primary Completion Date
December 31, 2018
Study Completion Date
December 31, 2018
Overprescribing letter to attributed physician
Letter telling patient's attributed physician they were under review for high prescribing
Placebo letter to attributed physician
Letter to patient's attributed physician about unrelated Medicare regulation
Columbia University, New York
Harvard T.H. Chan School of Public Health, Boston
National Bureau of Economic Research, Cambridge
National Bureau of Economic Research, Inc.
OTHER
Harvard School of Public Health (HSPH)
OTHER
National Institute on Aging (NIA)
NIH
Columbia University
OTHER