External and Internal Validity of a Geographic Quasi-Experiment Embedded in Cluster-Randomized Experiment

Sebastian Galiani, Patrick McEwan and Brian Quistorff

No 22468, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: This paper analyzes a geographic quasi-experiment embedded in a cluster-randomized experiment in Honduras. In the experiment, average treatment effects on school enrollment and child labor were large—especially in the poorest blocks—and could be generalized to a policy-relevant population given the original sample selection criteria. In contrast, the geographic quasi-experiment yielded point estimates that, for two of three dependent variables, were attenuated. A judicious policy analyst without access to the experimental results might have provided misleading advice based on the magnitude of point estimates. We assessed two main explanations for the difference in point estimates, related to external and internal validity.

JEL-codes: O22 (search for similar items in EconPapers)
Date: 2016-07
New Economics Papers: this item is included in nep-dev, nep-exp and nep-ure
Note: DEV
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Published as Internal and external validity of a geographical quasi-experiment embedded in a randomized control experiment, in Advances in Econometrics, Volume 38, M. Cattaneo and J. C. Escanciano (eds.), North-Holland, 2016

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Related works:
Chapter: External and Internal Validity of a Geographic Quasi-Experiment Embedded in a Cluster-Randomized Experiment (2017)
Working Paper: External and Internal Validity of a Geographic Quasi-Experiment Embedded in Cluster-Randomized Experiment (2016)
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