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

  title={Inference with Imperfect Randomization : The Case of the Perry Preschool Program ∗},
  author={James A Heckman and Rodrigo B Pinto},
This paper considers the problem of making inferences about the effects of a program on multiple outcomes when the assignment of treatment status is imperfectly randomized. By imperfect randomization we mean that treatment status is reassigned after an initial randomization on the basis of characteristics that may be observed or unobserved by the analyst. We develop a partial identification approach to this problem that makes use of information limiting the extent to which randomization is… CONTINUE READING


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