JIAB-2026-KCYZ
Sensitivity Analysis for Unmeasured Confounding in Difference-in-Differences
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Abstract
We derive sharp bounds for the average treatment effect in difference-in-differences designs when the parallel trends assumption is violated by unmeasured confounders. Our approach extends Manski-type partial identification to panel settings and provides closed-form sensitivity parameters with natural interpretations.
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1 messageA Author Cover letter
This paper proposes a new sensitivity analysis framework for DiD that practitioners can apply without strong parametric assumptions.
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