On Extrapolation of Treatment Effects in Multiple-Cutoff Regression Discontinuity Designs

Yuta Okamoto and Yuuki Ozaki

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Abstract: Regression discontinuity (RD) designs typically identify the treatment effect at a single cutoff point. But when and how can we learn about treatment effects away from the cutoff? This paper addresses this question within a multiple-cutoff RD framework. We begin by examining the plausibility of the constant bias assumption proposed by Cattaneo, Keele, Titiunik, and Vazquez-Bare (2021) through the lens of rational decision-making behavior, which suggests that a kind of similarity between groups and whether individuals can influence the running variable are important factors. We then introduce an alternative set of assumptions and propose a broadly applicable partial identification strategy. The potential applicability and usefulness of the proposed bounds are illustrated through two empirical examples.

Date: 2024-12
New Economics Papers: this item is included in nep-ecm
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