Inference with Imperfect Randomization: The Case of the Perry Preschool Program
AbstractThis paper considers the problem of inference about the effect of a program on multiple outcomes when assignment of treatment status is imperfectly randomized. Here, by imperfect randomization we mean that treatment status may have been reassigned after the initial randomization on the basis of observed or unobserved characteristics. We develop our methodology in the context of the High/Scope Perry Preschool program. We find significant effects of the program on a number of different outcomes of interest, including outcomes related to criminal activity for males, even after accounting for the imperfectness of the randomization and the multiplicity of hypotheses. On the other hand, effects of the program on other outcomes of interest, including outcomes related to criminal behavior for females, are no longer significant after more careful scrutiny.
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Bibliographic InfoPaper provided by Society for Economic Dynamics in its series 2010 Meeting Papers with number 1336.
Date of creation: 2010
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Postal: Society for Economic Dynamics Christian Zimmermann Economic Research Federal Reserve Bank of St. Louis PO Box 442 St. Louis MO 63166-0442 USA
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Other versions of this item:
- Heckman, James J. & Pinto, Rodrigo & Shaikh, Azeem M. & Yavitz, Adam, 2011. "Inference with Imperfect Randomization: The Case of the Perry Preschool Program," IZA Discussion Papers 5625, Institute for the Study of Labor (IZA).
- James J. Heckman & Rodrigo Pinto & Azeem M. Shaikh & Adam Yavitz, 2011. "Inference with Imperfect Randomization: The Case of the Perry Preschool Program," NBER Working Papers 16935, National Bureau of Economic Research, Inc.
- C31 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Cross-Sectional Models; Spatial Models; Treatment Effect Models; Quantile Regressions; Social Interaction Models
- I21 - Health, Education, and Welfare - - Education - - - Analysis of Education
- J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth
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