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American Economic Journal: Applied Economics: Vol. 1 No. 4 (October 2009)
AEJ: Applied Volume. 1, Issue 4 | 
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AEJ: Applied Forthcoming Articles
In Pursuit of Balance: Randomization in Practice in Development Field Experiments
Article Citation
Bruhn, Miriam, and
David McKenzie. 2009. "In Pursuit of Balance: Randomization in Practice in Development Field Experiments."
American Economic Journal: Applied Economics,
1(4): 200-232.
DOI: 10.1257/app.1.4.200
DOI: 10.1257/app.1.4.200
Abstract
We present new evidence on the randomization methods used in existing
experiments, and new simulations comparing these methods.
We
find that many papers do not describe the randomization in detail,
implying that better reporting is needed. Our simulations suggest
that in samples of 300 or more, the different methods perform similarly.
However, for very persistent outcome variables, and in smaller
samples, pair-wise matching and stratification perform best and
appear to dominate the rerandomization methods commonly used in
practice. The simulations also point to specific recommendations for
which variables to balance on, and for which controls to include in
the ex post analysis. (JEL C83, C93, O12)
Article Full-Text Access
Full-text Article
Additional Materials
Download Data Set (179.74 KB) | Online Appendix (579.45 KB)
Authors
Bruhn, Miriam (World Bank)
McKenzie, David (World Bank)
McKenzie, David (World Bank)
JEL Classifications
C83: Survey Methods; Sampling Methods
C93: Field Experiments
O12: Microeconomic Analyses of Economic Development
C93: Field Experiments
O12: Microeconomic Analyses of Economic Development
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