Houston David J, Richardson Lilliard E
Department of Political Science, 1001 McClung Tower, University of Tennessee, Knoxville, TN 37996-0410, United States.
Accid Anal Prev. 2008 Jan;40(1):200-8. doi: 10.1016/j.aap.2007.05.005. Epub 2007 Jun 18.
Using cross-sectional time series data for the 50 states and Washington, DC, covering the period 1975-2004, we estimate fixed effects regression models that examine the effects of universal and partial helmet laws on three different motorcyclist fatality rates, while controlling for other state policies and characteristics. Depending on the particular measure that is employed, states with universal helmet laws have motorcyclist fatality rates that are on average 22-33% lower in comparison to the experience with no helmet law. Additionally, partial coverage helmet laws are associated with reductions in motorcyclist fatality rates of 7-10%, on average.
利用1975年至2004年期间美国50个州和华盛顿特区的横截面时间序列数据，我们估计了固定效应回归模型，该模型在控制其他州政策和特征的同时，考察了普遍和部分头盔法对三种不同摩托车手死亡率的影响。根据所采用的具体衡量标准，实行普遍头盔法的州，其摩托车手死亡率与没有头盔法时相比，平均低22%至33%。此外，部分覆盖的头盔法平均使摩托车手死亡率降低了7%至10%。
