🤖 AI Summary
In finite-population causal inference, interference effects preclude the existence of a universally applicable and conservative variance estimator. This work proposes the Neyman Jackknife framework, which achieves conservative inference for the variance of causal effect estimators under arbitrary interference structures by re-estimating treatment effects after omitting subsets of treatment assignments. The approach unifies the classical Neyman variance estimator under the Stable Unit Treatment Value Assumption (SUTVA) with the Newey-West heteroskedasticity-and-autocorrelation-consistent (HAC) estimator from time series analysis, offering a general and flexible blueprint for variance estimation. Numerical experiments demonstrate that the proposed framework performs comparably to, and often better than, specialized baseline methods across a range of interference settings.
📝 Abstract
We propose a framework, the Neyman Jackknife, for conservative variance estimation in finite-population causal inference under interference. Our approach provides a general, flexible blueprint that enables conservative variance estimation whenever we are able to recompute our target estimator with some treatment assignments omitted. In classical settings, our approach recovers estimators closely related to the Neyman estimator under SUTVA and the Newey-West HAC variance estimator for time series. Numerical experiments suggest that our general-purpose framework yields variance estimators that can match or even surpass the performance of baselines that were purpose-built for specific applications.