Northwestern Events Calendar

Oct
22
2019

Seminar in Econometrics

When: Tuesday, October 22, 2019
3:30 PM - 5:00 PM  

Where: Kellogg Global Hub, 1410, 2211 Campus Drive, Evanston, IL 60208 map it

Audience: Faculty/Staff - Post Docs/Docs - Graduate Students

Contact: Cindy Pingry   847.467.7263

Group: Department of Economics: Seminar in Econometrics

Category: Academic

Description:

Michael Leung (University of Southern California): "Causal Inference Under Approximate Neighborhood Interference"

 Abstract: This paper studies causal inference in randomized experiments with network interference. The most common approach to modeling interference assumes that treatments assigned to alters only affect the ego's response through a low-dimensional exposure mapping. We instead study models satisfying a substantially weaker approximate neighborhood interference assumption that captures the intuition that treatments assigned to units far from the ego should have a small (but potentially nonzero) impact on the ego's response. We show that this assumption is satisfied in well-known models of social interactions, in contrast to the exposure mapping approach. When the data consists of a single large network, we prove that standard inverse probability weighted estimators can consistently estimate treatment and spillover effects and are asymptotically normal. Finally, we propose a new variance estimator.

 

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