Instrument-based estimation of full treatment effects with movers

Author:

Didier Nibbering, Matthijs Oosterveen

Keyword:

Economics, Econometrics, Econometrics (econ.EM)

journal:

date:

2023-06-11 16:00:00

Abstract

The effect of the full treatment is a primary parameter of interest in policy evaluation, while often only the effect of a subset of treatment is estimated. We partially identify the local average treatment effect of receiving full treatment (LAFTE) using an instrumental variable that may induce individuals into only a subset of treatment (movers). We show that movers violate the standard exclusion restriction, necessary conditions on the presence of movers are testable, and partial identification holds under a double exclusion restriction. We identify movers in four empirical applications and estimate informative bounds on the LAFTE in three of them.

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