Understanding fairness views and how they affect political views

Last registered on November 20, 2025
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Pre-Trial

Trial Information

General Information

Title
Understanding fairness views and how they affect political views
RCT ID
AEARCTR-0008396
Initial registration date
October 22, 2021

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
October 22, 2021, 1:11 PM EDT

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

Last updated
November 20, 2025, 11:43 AM EST

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

Locations

Country
Germany
Region

Primary Investigator

Name
Lisa Windsteiger
Affiliation
University of Salzburg and ifo Institute
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Other Primary Investigator(s)

PI Name
Mathias Dolls
PI Affiliation
ifo Institute
Contact Investigator

Additional Trial Information

Status
Completed
Start date
2021-10-20
End date
2022-10-31
Keywords
Behavior
Additional Keywords
Survey experiment, fairness views, inequality, policy preferences
JEL code(s)
D63, D72, D83, D91, H23
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
The proposed project aims to analyze the determinants of fairness views in Germany. We examine how fairness views differ across socio-demographic groups, how they are correlated with political attitudes and how information treatments on inter- and intragenerational fairness affect those attitudes and behaviour in an incentivized donation question. To this end, we run an online survey experiment in Germany.
External Link(s)

Registration Citation

Citation
Dolls, Mathias and Lisa Windsteiger. 2025. "Understanding fairness views and how they affect political views." AEA RCT Registry. November 20. https://doi.org/10.1257/rct.8396-1.1
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
We will examine how fairness views differ across socio-demographic groups, how they are correlated with political attitudes and how information treatments on inter- and intragenerational fairness affect those attitudes, as well as respondents' behavior in an incentivized donation question.
Intervention (Hidden)
Intervention Start Date
2021-10-20
Intervention End Date
2021-12-31

Primary Outcomes

Primary Outcomes (end points)
Incentivized donation question, political attitudes, fairness views
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Random provision of information about inter- and intragenerational inequality to subgroups of the sample (see attached document)
Experimental Design Details
Randomization Method
Computer
Randomization Unit
individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
1
Sample size: planned number of observations
4900
Sample size (or number of clusters) by treatment arms
1600
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethics Commission, Department of Economics, University of Munich
IRB Approval Date
2021-09-27
IRB Approval Number
2021-16
Analysis Plan

Analysis Plan Documents

Preanalysis plan

MD5: 4f79581536f44dcc42cc9033a111c963

SHA1: 3509b569d14f7f5cf70a0a6fc97f422dc95601ff

Uploaded At: October 20, 2021

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