Shaping Fairness Around Ourselves

Last registered on November 15, 2024
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Pre-Trial

Trial Information

General Information

Title
Shaping Fairness Around Ourselves
RCT ID
AEARCTR-0014797
Initial registration date
November 10, 2024

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
November 15, 2024, 1:43 PM EST

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

Locations

Country
Japan
Region
Tokyo

Primary Investigator

Name
Zakariah Ajaz
Affiliation
Hitotsubashi University
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Other Primary Investigator(s)

PI Name
Kan Takeuchi
PI Affiliation
Hitotsubashi University
Contact Investigator

Additional Trial Information

Status
In development
Start date
2024-11-11
End date
2025-03-31
Keywords
Behavior
Additional Keywords
Social Preferences, Bias
JEL code(s)
C92
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This research aims to investigate if co-ethnic in-group bias is expressed differently for envy and guilt for Brazilian and Japanese participants.
External Link(s)

Registration Citation

Citation
Ajaz, Zakariah and Kan Takeuchi. 2024. "Shaping Fairness Around Ourselves." AEA RCT Registry. November 15. https://doi.org/10.1257/rct.14797-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Intervention (Hidden)
Intervention Start Date
2024-11-11
Intervention End Date
2025-03-31

Primary Outcomes

Primary Outcomes (end points)
The degree of bias in distribution outcomes across different incomes.
FS values of envy and guilt for in-group and out-group players
Primary Outcomes (explanation)
Degree of bias is calculated as a proportion of the endowment allocated to the ingroup over all the questions.
The FS variables are calculated through McFadden's choice model

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Participants are asked to allocate money between a co-ethnic ingroup player and a different ethnicity outgroup player.
Experimental Design Details
We aim to investigate in-group bias in three player dictator games between Brazilian and Japanese participants. The research has two key objectives: 1) To measure if in-group bias is expressed differently for Brazilian and Japanese players, 2) To measure if in-group is expressed differentially in ahead-ness inequality aversion and behind-ness inequality aversion.

In the study, an online experiment will be held, where individuals can see the demographic information (Nationality, Age, and Gender) of a player of the same nationality as them, and a player that has a different nationality and will be asked to choose from 11 options to decide how to allocate money between them. The decision-maker will make 6 decisions where he is given a fixed relatively low wealth compared to the other two players, and 6 decisions where his is given a fixed relatively high wealth compared to the other two players. The dictator will be unable to change his own payoff, so the decision he makes will entirely capture his preference between the two other players. Every player will make a decision for two other players. Upon completion of the dictator game, players will be asked some follow-up questions which will be used to calculate their level of xenophobia and nationalism.
Randomization Method
Randomization is done by a computer
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
2 sub groups
Sample size: planned number of observations
100 Participants
Sample size (or number of clusters) by treatment arms
50 Japanese participants and 50 Brazilian participants
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
Hitotsubashi University Research Ethics Examination Committee
IRB Approval Date
2024-09-04
IRB Approval Number
2024C010
Analysis Plan

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Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
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