Productivity and Cohesion in Inter-ethnic Schools

Last registered on December 06, 2023


Trial Information

General Information

Productivity and Cohesion in Inter-ethnic Schools
Initial registration date
November 22, 2023

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
December 06, 2023, 7:50 AM EST

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


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Primary Investigator

University of Chicago

Other Primary Investigator(s)

PI Affiliation
University of Chicago

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
How to best rebuild human ties in post-conflict settings is a pressing social question. We study how productivity and intergroup preferences are shaped by emphasizing common identity and emphasizing reference groups. In a few high schools, we will randomize pairs of inter-ethnic students, and ask them to play a cooperative video game. We will collect outcomes on productivity during the interaction, and social preferences during the interaction, and a few weeks later.
External Link(s)

Registration Citation

Anisfeld, Ari and Pepi Pandiloski. 2023. "Productivity and Cohesion in Inter-ethnic Schools." AEA RCT Registry. December 06.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
1. Productivity
2. Mutual learning
3. Outgroup altruism
4. Willingness to interact with outgroup
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We will include a control arm and three treatment arms. The control arm will consist of co-ethnic teams. Treatment 1 will estimate the effect of mixing ethnicities on productivity and cohesion. Treatment 2 will emphasize a common identity (school and town), while Treatment 3 will additionally add a common foe (supra-ethnic reference group).
Experimental Design Details
Not available
Randomization Method
Computer randomization. First, students are assigned to control or one of three treatment arms, then they are paired with a partner from their respective treatment arm.

To the extent possible, we will employ block randomization, where we will pair students within grade and gender.
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
3 high schools
Sample size: planned number of observations
Sample size (or number of clusters) by treatment arms
200 control, 200 contact, 200 common identity, 200 common identity + common foe
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
The University of Chicago Social and Behavioral Sciences Institutional Review Board
IRB Approval Date
IRB Approval Number