Shaping the Habits of Teen Drivers
研究澳大利亚一项禁止新手司机深夜搭载多名同伴的法律，发现该干预使相关事故、伤亡减少一半以上，并产生广泛持久的积极溢出效应。
We show that a targeted law can modify teens’ risky behavior. We examine the effects of an Australian intervention banning first-year drivers from driving late at night with multiple peers, which had accounted for one-fifth of their traffic fatalities. Using data on individual drivers linked to crash outcomes, we find the reform more than halves targeted crashes, casualties and deaths. There are large positive spillovers through lower crashes earlier in the evening and beyond the first year, suggesting broad and persistent declines in high-risk driving. Overall, the targeted intervention delivers gains comparable to harsher restrictions that delay teen driving.