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Exchanging Private Information to Sustain Cooperation in Noisy, Indefinitely Repeated Interactions
Last registered on February 07, 2020

Pre-Trial

Trial Information
General Information
Title
Exchanging Private Information to Sustain Cooperation in Noisy, Indefinitely Repeated Interactions
RCT ID
AEARCTR-0005369
Initial registration date
January 31, 2020
Last updated
February 07, 2020 3:57 PM EST
Location(s)
Region
Primary Investigator
Affiliation
University of Konstanz
Other Primary Investigator(s)
PI Affiliation
University of Konstanz
PI Affiliation
University of Konstanz
Additional Trial Information
Status
In development
Start date
2020-02-03
End date
2020-07-31
Secondary IDs
Abstract
We study the role of exchanging private information in a noisy indefinitely repeated Prisoner's Dilemma with imperfect monitoring for cooperation in a laboratory experiment. The laboratory environment allows us to tightly control opportunities to communicate, whether signals are private or public, and the correlation structure of the signals. Controlling these factors allows us to address the following research questions:

What is the causal effect of the opportunity to report private information on the cooperation between participants? What is the role of the correlation structure for this effect? To what extend does the opportunity to report private information mitigate the problems associated with private monitoring? To what extend do experimental participants exploit the information contained in the correlation of signals?
External Link(s)
Registration Citation
Citation
Bao, Yongping, Fabian Dvorak and Sebastian Fehrler. 2020. "Exchanging Private Information to Sustain Cooperation in Noisy, Indefinitely Repeated Interactions." AEA RCT Registry. February 07. https://doi.org/10.1257/rct.5369-1.0.
Experimental Details
Interventions
Intervention(s)
We vary the correlation and communication structure in a between-subject design.
Intervention Start Date
2020-02-03
Intervention End Date
2020-07-31
Primary Outcomes
Primary Outcomes (end points)
The average cooperation rate in the last three supergames.
Primary Outcomes (explanation)
The average of the mean cooperation rates of the matching groups of a treatment. The mean cooperation rate of a matching group is the relative frequency of cooperation in the first 5 periods of the last 3 supergames.
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We implement up to five different treatments varying the correlation and communication structure in a between-subject design.
Experimental Design Details
Randomization Method
Subjects are randomly assigned to one of the treatments in the lab.
Randomization Unit
Experimental session
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
45 matching groups
Sample size: planned number of observations
360
Sample size (or number of clusters) by treatment arms
120
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
We will be able to detect a difference in the cooperation rates of two treatments of 10 percentage points with 80% power.
Supporting Documents and Materials

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IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
German Association for Experimental Economic Research e.V.
IRB Approval Date
2020-01-30
IRB Approval Number
C6C1g6Kj
Analysis Plan

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Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is data collection complete?
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports, Papers & Other Materials
Relevant Paper(s)
REPORTS & OTHER MATERIALS