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American Economic Review Vol. 105 No. 5 2015

The Catch-22 of External Validity in the Context of Constraints to Firm Growth

Greg Fischer1; Dean Karlan2

1 London School of Economics, 32 Lincoln's Inn Fields, 3.09, London WC2A 2AE, IPA, and MIT J-PAL (e-mail: ) · 2 Yale University, 27 Hillhouse Avenue, New Haven, CT 06511, IPA, MIT J-PAL, and NBER, (e-mail: )

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Abstract

We document the presence of multiple and varied constraints to small and medium firm growth. This presents both a practical problem for business training programs and a challenge to academic economists trying to identify mechanisms though which these programs may affect outcomes. External validity needs theory. This pushes researchers to narrowly defined and highly selected sample frames, which limits the potential for clear, generalizable policy prescriptions. Ultimately, larger samples, multi-arm evaluations, process documentation, and narrowly-focused, theory-supported empirical work are all needed, but the complexity of the problem limits what we learn from any single study.

DOI
10.1257/aer.p20151078
Volume
105
Issue
5
Pages
295-299
Language
en
Sources
bibtex:phds-export.bib openalex crossref

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