Dynamic Complementarity

This research was supported in part by NIH grants NICHD R37HD065072 and NIH R01HD103666, Hong Kong RGC ECS Grant 9048312, the China Development Research Foundation, the University of Chicago’s Provost Global Faculty Award, and an anonymous donor. The program data have been registered at AEA with registry number AEARCTR-0007119. We thank our partners on the China REACH project: China Development Research Foundation (CDRF), Beijing Normal University, Child Development Research Group at the University of West Indies, and Dr. Sally Grantham-McGregor. Chris Walters, the editor, and two anonymous referees made valuable comments on the first version of the paper. We thank the editor and an anonymous referee for helpful comments on the second and third revisions of this paper. Flavio Cunha, Tamara McGavock, and Fanmei Xia made valuable suggestions. The views expressed in this paper are solely those of the authors and do not necessarily represent those of the funders, partners, or the official views of the National Institutes of Health. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

• Online appendix
• randomized controlled trials registry entry