. . . . . . "5054888"^^ . . "3258"^^ . "884783652"^^ . . "Selective recruitment is an observed effect in traffic safety. When safety belt laws are passed, belt wearing rates increase, but casualties decline by smaller percentages than estimated in a simple calculation. This is because those converted from non-use to use are not \u201Crecruited\u201D random members of the driving population. Instead, users differ from non-users in many ways that influence safety. Two effects are: \n* 1. When non-wearers crash, they have more severe crashes. \n* 2. Non-wearers are more likely to crash"@en . . . "Selective recruitment"@en . . . . . . "Selective recruitment is an observed effect in traffic safety. When safety belt laws are passed, belt wearing rates increase, but casualties decline by smaller percentages than estimated in a simple calculation. This is because those converted from non-use to use are not \u201Crecruited\u201D random members of the driving population. Instead, users differ from non-users in many ways that influence safety. Two effects are: \n* 1. When non-wearers crash, they have more severe crashes. \n* 2. Non-wearers are more likely to crash"@en . . .