Group Image Concerns
Last registered on July 23, 2021

Pre-Trial

Trial Information
General Information
Title
Group Image Concerns
RCT ID
AEARCTR-0007749
Initial registration date
May 31, 2021
Last updated
July 23, 2021 10:42 AM EDT
Location(s)

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Primary Investigator
Affiliation
University of Cologne
Other Primary Investigator(s)
PI Affiliation
University of Cologne
PI Affiliation
University of Cologne
Additional Trial Information
Status
In development
Start date
2021-06-01
End date
2022-12-31
Secondary IDs
Abstract
We implement a laboratory online experiment to measure group image concerns and compare their strength to (individual) social image concerns.
External Link(s)
Registration Citation
Citation
Apffelstaedt, Arno, Gönül Dogan and Fabian Hoffmann. 2021. "Group Image Concerns." AEA RCT Registry. July 23. https://doi.org/10.1257/rct.7749-1.1.
Experimental Details
Interventions
Intervention(s)
There are two treatment variations: (1) Individual vs. Group and (2) Anonymous vs. Public donations.
Intervention Start Date
2021-06-01
Intervention End Date
2021-12-31
Primary Outcomes
Primary Outcomes (end points)
Donation amounts, Willingness to pay to avoid publicity
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Using an online (laboratory) experiment, we investigate how the amount donated to charity depends on (1) whether the donation is personal or on behalf of a group, (2) whether the donation is anonymous or public (for the individual or the group). We investigate how the willingness to pay to avoid public announcement of a donation depends on whether the donation is personal or on behalf of a group.
Experimental Design Details
Not available
Randomization Method
Random computer draw (by program)
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
240 individuals
Sample size: planned number of observations
960 decisions (4 by subject)
Sample size (or number of clusters) by treatment arms
240 individuals
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
German Association for Experimental Economic Research
IRB Approval Date
2021-05-31
IRB Approval Number
WKaJuuTZ
IRB Name
Ethics Committee of the Faculty of Business, Economics and Social Sciences, University of Cologne
IRB Approval Date
2021-06-08
IRB Approval Number
210016FH
Analysis Plan

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