An article by Dr Marty Makary in Newsweek (September 24, 2012) describes medical error rates at 25%, with 100,000 people dying due to preventable errors. But he suggests that data transparency, such as the publication of heart surgery data by the New York health commissioner, reduced mortality rates at one hospital from 18% to under 1.7%. Public data dissemination increased teamwork and eliminated surgeons wi poor outcomes. But does data transparency cause riskier cases to be declined and treated in nearby states without such data transparency ? Will public data sharing without a context of patient criticality hurt patients in the end ? How important are individual incentives if the doctor is held responsible for all outcomes ?