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

Sebastian Galiani, Patrick McEwan and Brian Quistorff

A chapter in Regression Discontinuity Designs, 2017, vol. 38, pp 195-236 from Emerald Group Publishing Limited

Abstract: This chapter analyzes a geographic quasi-experiment embedded in a cluster-randomized experiment in Honduras. In the experiment, average treatment effects of conditional cash transfers on school enrollment and child labor were large – especially in the poorest experimental 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.

Keywords: Geographical natural experiment; internal validity and external validity (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (9)

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Related works:
Working Paper: External and Internal Validity of a Geographic Quasi-Experiment Embedded in Cluster-Randomized Experiment (2016)
Working Paper: External and Internal Validity of a Geographic Quasi-Experiment Embedded in Cluster-Randomized Experiment (2016)
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Persistent link: https://EconPapers.repec.org/RePEc:eme:aecozz:s0731-905320170000038009

DOI: 10.1108/S0731-905320170000038009

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