The Impact of Attrition on the Children of the NLSY79
分析NLSY79中母亲样本流失及其子女样本流失的非随机性，发现流失与婚姻状况、祖父教育、家庭收入相关，但对早期家庭收入或母亲就业影响儿童测试得分的估计影响不大，完全缺失的儿童可能最弱势但数量少，影响有限。
Abstract This paper examines the impact of attrition among the women of the National Longitudinal Survey of Youth 1979 (NLSY79) and children in the NLSY79 Mother-Child Supplement (NLSY79-C). Attrition among the children is nonrandom with respect to mother's marital status, grandfather's completed schooling, and family income. These differences that are related to the probability of attrition do not appear to impact estimates of the effects of family income or maternal employment early in the child's life on either PPVT or BPI standard scores. However, the women who are not interviewed in any child-supplement year and the children for whom supplemental information is never collected appear to be the most disadvantaged. The omission of these children from the NLSY79-C may impact estimates of family characteristics on child outcomes, but because there are relatively few such children, the effects of their omission are likely to be small.