An Economic Experiment on Preferences for In-Group vs Out-Group Cooperation

Last registered on November 17, 2020

Pre-Trial

Trial Information

General Information

Title
An Economic Experiment on Preferences for In-Group vs Out-Group Cooperation
RCT ID
AEARCTR-0005316
Initial registration date
January 18, 2020

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
January 21, 2020, 2:05 PM EST

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

Last updated
November 17, 2020, 6:33 AM EST

Last updated is the most recent time when changes to the trial's registration were published.

Locations

Region

Primary Investigator

Affiliation
University Pompeu Fabra Barcelona

Other Primary Investigator(s)

Additional Trial Information

Status
Completed
Start date
2020-01-21
End date
2020-03-15
Secondary IDs
Abstract
The ability to cooperate with strangers outside the restricted circle of close-knit communities and family members is a key determinant for the development of markets and the creation of well-being. In this project, I study the causal effect that property rights institutions have on social preference for cooperation. More specifically, the project tests how a land rights reform that modifies the system of land rights in a developing country affected the ability to cooperate within participants' communities and with strangers outside these communities. To do so, I run a multilevel public good game experiment and I combine it with the unique implementation strategy of the reform in order to achieve identification. The pre-analysis present the data sources, the structure of the experiment, and the empirical strategy.
External Link(s)

Registration Citation

Citation
Fabbri, Marco. 2020. "An Economic Experiment on Preferences for In-Group vs Out-Group Cooperation." AEA RCT Registry. November 17. https://doi.org/10.1257/rct.5316
Experimental Details

Interventions

Intervention(s)
See pre-analysis plan.
Intervention Start Date
2020-01-21
Intervention End Date
2020-03-15

Primary Outcomes

Primary Outcomes (end points)
1) Contribution to public good when the game is played within the participant's community
2) Contribution to public good when the game is played with participants coming from different communities
Primary Outcomes (explanation)
See pre-analysis plan.

Secondary Outcomes

Secondary Outcomes (end points)
See pre-analysis plan.
Secondary Outcomes (explanation)
See pre-analysis plan.

Experimental Design

Experimental Design
I randomly selected a set of villages among a sample who volunteered to have a property rights reform implemented. See attached pre-analysis plan for details.
Experimental Design Details
Randomization Method
By computer in office
Randomization Unit
Village
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
32
Sample size: planned number of observations
576
Sample size (or number of clusters) by treatment arms
288
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Comitat d'Investigacio CEIC - Parc de Salut Mar Barcelona
IRB Approval Date
2018-04-11
IRB Approval Number
2018/8015/I
Analysis Plan

Analysis Plan Documents

An Economic Experiment on Preferences for In-Group vs Out-Group Cooperation

MD5: 748130c3a021ef5bdb2193b07e2536dd

SHA1: 1faf49cf33335d624499a860bf85311559e7da2a

Uploaded At: January 18, 2020

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
Yes
Intervention Completion Date
March 15, 2020, 12:00 +00:00
Data Collection Complete
Yes
Data Collection Completion Date
March 15, 2020, 12:00 +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
32
Was attrition correlated with treatment status?
No
Final Sample Size: Total Number of Observations
576
Final Sample Size (or Number of Clusters) by Treatment Arms
288
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials