Late Again with Defiers

Clément de Chaisemartin and Xavier D'Haultfoeuille

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Abstract: We show that the Wald statistic still identifies a causal effect if instrument monotonicity is replaced by a weaker condition, which states that the potential propensities to be treated with or without the instrument should have the same distribution, conditional on potential outcomes. This holds for instance if the slippages between these potential propensities and the average propensity are independent of potential outcomes. In this framework, the Wald statistic identifies a LATE on a population which comprises both compliers and always takers.

Keywords: Instrumental Variables; Monotonicity; Defiers; Rank Invariance; Exchangeable random variables (search for similar items in EconPapers)
Date: 2012-05
New Economics Papers: this item is included in nep-ecm
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Related works:
Journal Article: Tolerating defiance? Local average treatment effects without monotonicity (2017)
Working Paper: Defying the LATE? Identication of local treatment eects when the instrument violates monotonicity (2013)
Working Paper: Defying the LATE? Identification of local treatment effects when the instrument violates monotonicity (2013)
Working Paper: Late again, whithout Monotonicity (2012)
Working Paper: Late Again with Defiers (2012)
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