| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w25888 |
| 来源ID | Working Paper 25888 |
| The Perry Preschoolers at Late Midlife: A Study in Design-Specific Inference | |
| James J. Heckman; Ganesh Karapakula | |
| 发表日期 | 2019-06-03 |
| 出版年 | 2019 |
| 语种 | 英语 |
| 摘要 | This paper presents the first analysis of the life course outcomes through late midlife (around age 55) for the participants of the iconic Perry Preschool Project, an experimental high-quality preschool program for disadvantaged African-American children in the 1960s. We discuss the design of the experiment, compromises in and adjustments to the randomization protocol, and the extent of knowledge about departures from the initial random assignment. We account for these factors in developing conservative small-sample hypothesis tests that use approximate worst-case (least favorable) randomization null distributions. We examine how our new methods compare with standard inferential methods, which ignore essential features of the experimental setup. Widely used procedures produce misleading inferences about treatment effects. Our design-specific inferential approach can be applied to analyze a variety of compromised social and economic experiments, including those using re-randomization designs. Despite the conservative nature of our statistical tests, we find long-term treatment effects on crime, employment, health, cognitive and non-cognitive skills, and other outcomes of the Perry participants. Treatment effects are especially strong for males. Improvements in childhood home environments and parental attachment appear to be an important source of the long-term benefits of the program. |
| 主题 | Econometrics ; Estimation Methods ; Health, Education, and Welfare ; Education |
| URL | https://www.nber.org/papers/w25888 |
| 来源智库 | National Bureau of Economic Research (United States) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/583562 |
| 推荐引用方式 GB/T 7714 | James J. Heckman,Ganesh Karapakula. The Perry Preschoolers at Late Midlife: A Study in Design-Specific Inference. 2019. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| w25888.pdf（685KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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