A new study shows the efficacy of three possible approaches, but there are drawbacks:
Does the experiment show that doctors are educable or bribable, or both? Unfortunately, since the three elements of the intervention (education, computer warnings or reminders, and money) were delivered at the same time, it is impossible to know which had the main effect. However, whichever it was, the effect lasted for at least 48 weeks after the financial incentive was withdrawn.