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More powerful cluster randomized control trials

More powerful cluster randomized control trials
More powerful cluster randomized control trials
Balanced experimental designs, in which the number of treatment and control units are the same, do not maximize power subject to a cost constraint when treat- ment units are more expensive than control ones. Despite this, such balanced designs are the norm in economics. This paper describes methods to optimally choose the number of treatment and control clusters, and the number of units within treatment and control clusters, allowing for full flexibility. We use three archetypal examples from the development literature to illustrate the magnitude of the power gains, which lie between 8.5 and 19 percentage points.
Mcconnell, Brendon
c513d7c3-60d0-4d1a-9a0c-8763e2aeb52a
Vera Hernandez, Marcos
343a3080-8d3c-4250-8e0b-fb3c62548c3c
Mcconnell, Brendon
c513d7c3-60d0-4d1a-9a0c-8763e2aeb52a
Vera Hernandez, Marcos
343a3080-8d3c-4250-8e0b-fb3c62548c3c

Mcconnell, Brendon and Vera Hernandez, Marcos (2022) More powerful cluster randomized control trials 43pp.

Record type: Monograph (Working Paper)

Abstract

Balanced experimental designs, in which the number of treatment and control units are the same, do not maximize power subject to a cost constraint when treat- ment units are more expensive than control ones. Despite this, such balanced designs are the norm in economics. This paper describes methods to optimally choose the number of treatment and control clusters, and the number of units within treatment and control clusters, allowing for full flexibility. We use three archetypal examples from the development literature to illustrate the magnitude of the power gains, which lie between 8.5 and 19 percentage points.

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Published date: 14 June 2022
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Identifiers

Local EPrints ID: 474702
URI: http://eprints.soton.ac.uk/id/eprint/474702
PURE UUID: 0076659a-10d8-4c83-9b4a-6d7d0a61981f
ORCID for Brendon Mcconnell: ORCID iD orcid.org/0000-0001-6029-9479

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Date deposited: 01 Mar 2023 18:00
Last modified: 17 Mar 2024 00:29

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Contributors

Author: Brendon Mcconnell ORCID iD
Author: Marcos Vera Hernandez

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