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Understanding Ethnic Cooperation: Evidence from Experiments in Kenya and Tanzania
Last registered on May 28, 2013

Pre-Trial

Trial Information
General Information
Title
Understanding Ethnic Cooperation: Evidence from Experiments in Kenya and Tanzania
RCT ID
AEARCTR-0000016
Initial registration date
May 28, 2013
Last updated
May 28, 2013 7:50 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
University of California, Berkeley
Other Primary Investigator(s)
PI Affiliation
Norwegian School of Economics
PI Affiliation
Norwegian School of Economics
PI Affiliation
University of California, Berkeley
PI Affiliation
Norwegian School of Economics
PI Affiliation
Stanford University
PI Affiliation
MIT
Additional Trial Information
Status
Completed
Start date
2012-07-16
End date
2013-02-14
Secondary IDs
Abstract
Ethnic polarization is often linked to underdevelopment and poor governance. What amplifies and what mitigates ethnic tensions amongst individuals in a society? This project aims to understand how subtle and moderate changes in context can impact economic behavior. We use behavioral economics experiments to measure altruism, cooperation, and expected generosity in within-group and across-group interactions. Using “priming” within the lab, we identify if these behavioral outcomes vary with the increased situational salience of ethnic identity, national identity, or political competition. We replicate our design at two time points in Nairobi, Kenya (with the second round being close in time to the 2013 national elections) to examine how election proximity might affect behavior, and in the capital (Dar es Salaam) of neighboring Tanzania to explore how differing political histories can shape current social interactions.
External Link(s)
Registration Citation
Citation
Berge, Lars Ivar Oppedal et al. 2013. "Understanding Ethnic Cooperation: Evidence from Experiments in Kenya and Tanzania." AEA RCT Registry. May 28. https://doi.org/10.1257/rct.16-1.0.
Former Citation
Berge, Lars Ivar Oppedal et al. 2013. "Understanding Ethnic Cooperation: Evidence from Experiments in Kenya and Tanzania." AEA RCT Registry. May 28. https://www.socialscienceregistry.org/trials/16/history/87.
Sponsors & Partners

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Experimental Details
Interventions
Intervention(s)
Different subject priming treatments in the lab. See the attached pre-analysis plan for details.
Intervention Start Date
2012-07-16
Intervention End Date
2013-02-14
Primary Outcomes
Primary Outcomes (end points)
Choices in multiple lab experimental games. See the attached pre-analysis plan for details.
Primary Outcomes (explanation)
See the attached pre-analysis plan for details.
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
See the attached pre-analysis plan for details.
Experimental Design Details
See the attached pre-analysis plan for details.
Randomization Method
Computer random number generator. See the attached pre-analysis plan for details.
Randomization Unit
Individual
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
2098 individuals (across Kenya and Tanzania)
Sample size: planned number of observations
2098 individuals (across Kenya and Tanzania)
Sample size (or number of clusters) by treatment arms
See the attached pre-analysis plan for details.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

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IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
University of California, Berkeley - Committee on the Protection of Human Subjects
IRB Approval Date
2012-07-01
IRB Approval Number
#2012-04-4287
IRB Name
Innovations for Poverty Action, Kenya IRB
IRB Approval Date
2012-07-07
IRB Approval Number
No approval #; signed by Carolyne Nekesa
IRB Name
Stanford University IRB
IRB Approval Date
2012-07-05
IRB Approval Number
#24582
Analysis Plan

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Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
Yes
Intervention Completion Date
February 14, 2013, 12:00 AM +00:00
Is data collection complete?
Yes
Data Collection Completion Date
February 14, 2013, 12:00 AM +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
2098 individuals (across Kenya and Tanzania)
Was attrition correlated with treatment status?
No
Final Sample Size: Total Number of Observations
2098 individuals (across Kenya and Tanzania)
Final Sample Size (or Number of Clusters) by Treatment Arms
See pre-analysis plan for details.
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports and Papers
Preliminary Reports
Relevant Papers