Nothing for something: Marketing cancer drugs to physicians increases prescribing without improving mortality

Physicians commonly receive marketing-related transfers from drug firms. We examine the impact of these relationships on the prescribing of physician-administered cancer drugs in Medicare. We find that prescribing of the associated drug increases 4% in the twelve months after a payment is received, with the increase beginning sharply in the month of payment and fading out within a year. A marketing payment also leads physicians to begin treating cancer patients with lower predicted mortality. While payments result in greater expenditure on cancer drugs, there are no associated improvements inpatient mortality.