Multi-Cutoff Rd Designs with Observations Located at Each Cutoff: Problems and Solutions
50 Pages Posted: 19 May 2022
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Multi-Cutoff Rd Designs with Observations Located at Each Cutoff: Problems and Solutions
Multi-Cutoff Rd Designs with Observations Located at Each Cutoff: Problems and Solutions
Abstract
In RD designs with multiple cutoffs, the identification of an average causal effect across cutoffs may be problematic if a marginally exposed subject is located exactly at each cutoff. This occurs whenever a fixed number of treatment slots is allocated starting from the subject with the highest (or lowest) value of the score, until exhaustion. Exploiting the "within" variability at each cutoff is the safest and likely efficient option. Alternative strategies exist, but they do not always guarantee identification of a meaningful causal effect and are less precise. To illustrate our findings, we revisit the study of Pop-Eleches and Urquiola (2013).
Keywords: regression discontinuity, multiple cutoffs, normalizing-and-pooling
JEL Classification: C01
Suggested Citation: Suggested Citation