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<p><b>Regression discontinuity designs (RDD)</b> are a <a href="page.php?w=quasi-experiment">quasi-experiment</a>al pretest-posttest design that attempts to determine the causal effects of interventions by assigning a cutoff or threshold above or below which an intervention is assigned. By comparing observations lying closely on either side of the threshold, it is possible to estimate the <a href="page.php?w=average_treatment_effect">average treatment effect</a> in environments where <a href="page.php?w=random_assignment">random assignment</a> to</p><p>
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