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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...
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reporting of polling error has focused solely on sampling error, represented by the margin of error of a poll. Survey … jointly measures sampling and non-sampling errors. Extending the conventional language of polling, we think it reasonable to … coincide, noting that the TME exceeds the margin of sampling error whenever the pollster has less than complete knowledge of …
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We characterize the bias of propensity score based estimators of common average treatment effect parameters in the case of selection on unobservables. We then propose a new minimum biased estimator of the average treatment effect. We assess the finite sample performance of our estimator using...
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