NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Inference with Imperfect Randomization: The Case of the Perry Preschool Program

James J. Heckman, Rodrigo Pinto, Azeem M. Shaikh, Adam Yavitz

NBER Working Paper No. 16935
Issued in April 2011

---- Acknowledgements -----

This research was supported in part by the American Bar Foundation, the Committee for Economic Development, Pew Charitable Trusts and the Partnership for America's Economic Success, the JB and MK Pritzker Family Foundation, the Susan Thompson Buffett Foundation, Robert Dugger, the National Institute for Child Health and Human Development (Grants R01-HD043411 and R01-HD065072), the Institute for New Economic Thinking (Grant 262), and the National Science Foundation (Grant DMS-0820310). The views expressed in this paper are those of the authors and not necessarily those of the funders listed here, nor of the National Bureau of Economic Research. We thank Patrick Kline, Aprajit Mahajan, Joseph Romano, Andres Santos, Edward Vytlacil and Daniel Wilhelm for helpful comments. This paper has benefited from comments by seminar participants at Conference on Incomplete Models at the University of Montreal, October 2008; Yale University, November 2008; University College London, December 2008; University of California at Berkeley, February 2009; Aarhus University, March 2009; Annual Meetings of the Society for Economic Dynamics, July 2010; Summer Economic Conference at Seoul National University, August 2009 and August 2010; and Duke University, December 2010.

return to bibliography page

 
Publications
Activities
Meetings
NBER Videos
Data
People
About

Support
National Bureau of Economic Research, 1050 Massachusetts Ave., Cambridge, MA 02138; 617-868-3900; email: info@nber.org

Contact Us