Child Care and Early Education Research Connections

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Explore our collection of gray research literature (e.g., publicly available reports and briefs published by government agencies, and for-profit and nonprofit organizations), peer-reviewed journal articles, survey instruments, webinars, and descriptions of projects funded by the Office of Planning, Research, and Evaluation. Learn more about the scope of our collection.

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Heckman James J. (James Joseph), Pinto Rodrigo, Shaikh Azeem M., Yavitz Adam, April 2011
Reports & Papers
A discussion of the implications of imperfectly randomized assignment on the determination of treatment effects, with an analysis of findings from the Perry Preschool Program in light of these implications