Intended and Unintended Effects of Youth Bicycle Helmet Laws
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Over 20 states have adopted laws requiring youths to wear a helmet when riding a bicycle. We confirm previous research indicating that these laws reduced fatalities and increased helmet use, but we also show that the laws significantly reduced youth bicycling. We find this result in standard two-way
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美国国家经济研究局创建时间：
2010-01-01
