本文比较了促进弱势儿童在几代人和几代人之间社会流动性的早期儿童丰富项目。我们没有进行标准的元分析，而是对形成当前政策的项目进行了统一的初级数据分析。我们的分析是跨程序严格综合和比较的模板。我们分析了为标志性项目收集的新的长期生命周期数据，当时参与者已到中年，他们的孩子20多岁。这些标志性的项目本质上是综合性的，为儿童及其父母提供许多服务。我们将它们与相对低成本、更专注的家访项目进行比较。成功的干预措施既针对儿童，也针对他们的照顾者。他们吸引照顾者，改善儿童的家庭生活。它们能永久性地提高认知和非认知技能。参与丰富家庭环境项目的人在成长过程中拥有更好的技能、工作、收入、婚姻稳定和健康，同时减少了犯罪。 Long-run monetized gains are substantially greater than program costs for iconic programs. We investigate the mechanisms promoting successful family lives for participants and find intergenerational effects on their children. A study of focused home-visiting programs that target parents enables us to isolate a crucial component of successful programs: they activate and promote parenting skills of child caregivers. The home-visiting programs we analyze produce outcomes comparable to those of the iconic omnibus programs. National implementation of the programs with long-run follow up that we analyze would substantially shrink the overall US Black-White earnings gap.