"So there is little doubt that financial incentives work well, even if the outcome is undesirable. Consider a 2011 traffic accident in the Chinese city of Foshan. A two-year-old girl, walking through an outdoor market, was hit by a van. The driver stopped as the girl's body slid beneath the vehicle. But he didn't get out to help. After a pause, he drove away, running over the body again. The girl later died. The driver eventually turned himself in to the police. A recording that was widely reported to be a phone call with the driver was broadcast on the news. "If she is dead," he explained, "I may pay only about 20,000 yuan"--roughly $3,200. "But if she is injured, it may cost me hundreds of thousands yuan."