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from the road safety campaigns should be contrasted with the lack of obvious effect on head injuries from helmet laws. Yet helmet laws were far more expensive. All published cost-benefit analyses of injury rates before and after helmet laws show the cost of helmets exceeded any estimated savings in healthcare costs. 7 20 Contributors and sources: DLR cycles almost every day. She is interested in statistical modelling and the consequences of fitting incorrect or inappropriate models.
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Hagel et al. (2006) studied this question.
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