Kaizen management and corporate cohesion

Last registered on May 26, 2022


Trial Information

General Information

Kaizen management and corporate cohesion
Initial registration date
May 25, 2022

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 26, 2022, 11:45 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.


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Primary Investigator

Sophia University

Other Primary Investigator(s)

PI Affiliation
Toyota Wessels Institute for Manufacturing Studies
PI Affiliation
University of Cape Town
PI Affiliation
Kobe University

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
We will conduct a randomized controlled trial of management trial in the automotive sector targeting tier 2 and tier 3, mostly local suppliers. Our training features the Kaizen approach, which is a Japan-pioneered production management approach, and the training will be provided in two phases. We will analyze its impacts on adopted management practices, business performance, and corporate cohesion. Corporate cohesion has been one of the major social problems in this formally segregated country. We will test whether the improved production management that requires the cooperation of managers and workers will improve corporate cohesion. We will conduct a baseline survey in 2022, followed by the provision of the training, and will conduct follow-up surveys in 2023 and 2024.
External Link(s)

Registration Citation

Barnes, Justin et al. 2022. "Kaizen management and corporate cohesion ." AEA RCT Registry. May 26. https://doi.org/10.1257/rct.9492-1.0
Sponsors & Partners

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Experimental Details


The intervention includes two phases of management training.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
adopted management practices, business performance, corporate cohesion
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
A randomized controlled trial.
Experimental Design Details
Not available
Randomization Method
Randomization will be done in the office by a computer after the baseline survey.
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
132 firms.
Sample size: planned number of observations
396 firm-year level observations.
Sample size (or number of clusters) by treatment arms
33 firms receive treatment A, 66 firms receive treatment B, and 33 firms remain control.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
JICA Ogata Research Institute
IRB Approval Date
IRB Approval Number