Upcoming workshop

明治大学政治経済学部経済学科・明治大学EBPM研究センター共催

June 12,  2025 (Friday)  15:30-17:00, JST

Venue: 明治大学駿河台キャンパス　リバティタワー13階1134教室にて開催 

Room 1134, 13th Floor, Liberty Tower, Meiji University Surugadai Campus

※2026年度より会場が明治大学となっております

Guest Speaker：Juan Pantano (The University of Hong Kong)

Title：Unpacking the Spillover Effect: Evidence From a Randomized Voting Campaign

Abstract: Understanding what generates spillover effects matters for policy design, yet standard experimental estimates reveal only whether spillovers exist. Spillovers may arise because treated individuals transmit information to untreated peers, or because individuals’ turnout decisions respond directly to the behavior of those around them. We study these mechanisms using a voter–mobilization experiment, where untreated women in treated clusters increased turnout nearly as much as directly treated women. We combine the experimental variation with a structural model of turnout on a spatial network to decompose spillovers into information diffusion, strategic interaction effects and their interaction. The estimates show that information diffusion alone cannot explain the observed spillovers: strategic interactions play a quantitatively important role. The model also delivers counterfactual program effect curves, showing how turnout responds as treatment saturation varies and allows isolating the average individual treatment effect net from spillovers, both of which are not identified in a more agnostic or atheoretical, purely experimental analysis of the RCT.

※6月はハイブリッドで開催いたします。

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