Identification of Treatment Effects on the Treated with One-Sided Non-Compliance

Markus Frölich () and Blaise Melly ()
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Blaise Melly: Brown University

No 3671, IZA Discussion Papers from Institute for the Study of Labor (IZA)

Abstract: Traditional instrumental variable estimators do not generally estimate effects for the treated population but for the unobserved population of compliers. They do identify effects for the treated when there is one-sided perfect non-compliance. However, this property is lost when covariates are included in the model. In this case, we show that the effects for the treated are still identified but require modified estimators. We consider both average and quantile treatment effects and allow the instrument to be discrete or continuous.

Keywords: treatment effects; instrumental variables; non-compliance; missing data (search for similar items in EconPapers)
JEL-codes: C13 C14 C21 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-ecm
Date: 2008-08
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