Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/187782 
Year of Publication: 
2016
Citation: 
[Journal:] Development Engineering [ISSN:] 2352-7285 [Volume:] 1 [Publisher:] Elsevier [Place:] Amsterdam [Year:] 2016 [Pages:] 12-25
Publisher: 
Elsevier, Amsterdam
Abstract: 
In many randomized trials, subjects enter the sample sequentially. Because the covariates for all units are not known in advance, standard methods of stratification do not apply. We describe and assess the method of DA-optimal sequential allocation (Atkinson, 1982) for balancing stratification covariates across treatment arms. We provide simulation evidence that the method can provide substantial improvements in precision over commonly employed alternatives. We also describe our experience implementing the method in a field trial of a clean water and handwashing intervention in Dhaka, Bangladesh, the first time the method has been used. We provide advice and software for future researchers.
Subjects: 
Design of Experiments
Sequential randomization
Stratification
JEL: 
C93
O12
Persistent Identifier of the first edition: 
Creative Commons License: 
cc-by-nc-nd Logo
Document Type: 
Article

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