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NONEXPERIMENTAL VERSUS EXPERIMENTAL ESTIMATES OF EARNINGS IMPACTS

ABSTRACT: Nonexperimental or “quasi-experimental” evaluation methods, in which researchers use treatment and comparison groups without randomly assigning subjects to the groups, are often proposed as substitutes for randomized trials. Yet, nonexperimental (NX) methods rely on untestable assumptions. To assess these methods in the context of welfare, job training, and employment …
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