Perceived Relative Income and Revealed Preferences for Clean Air

Last registered on May 16, 2024


Trial Information

General Information

Perceived Relative Income and Revealed Preferences for Clean Air
Initial registration date
May 13, 2022

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
May 16, 2022, 5:20 PM EDT

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

Last updated
May 16, 2024, 7:36 AM EDT

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



Primary Investigator

Heidelberg University

Other Primary Investigator(s)

PI Affiliation
University of Stuttgart
PI Affiliation
Heidelberg University

Additional Trial Information

Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Across the globe, people tend to misperceive their true position in the income distribution. Theory predicts that a correction of this misperception leads to an increase in the demand for redistribution among the richer half of the population if people are averse to inequality. We test whether correcting perceived relative income has a significant and positive effect on the demand for environmental public goods, such as clean air. We test this hypothesis empirically with an online survey experiment with 2,500 Indian respondents recruited by Dynata.
External Link(s)

Registration Citation

Balietti, Anca, Angelika Budjan and Tillmann Eymess. 2024. "Perceived Relative Income and Revealed Preferences for Clean Air ." AEA RCT Registry. May 16.
Sponsors & Partners

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Experimental Details


We design an online survey experiment including (a) a survey questionnaire, (b) comprehensive information about air pollution in general and personalized information about the average PM2.5 level and the associated health effects for the participants' state of residence, and (c) the collection of outcome variables.

We collect several outcomes of interest. In particular, we offer the chance to contribute part of the remuneration for participation to one of several non-governmental organizations (NGO) leading air pollution reduction initiatives across India. The study is complemented by the elicitation of (i) stated support for public policies, (ii) intended adoption of private protective measures against PM2.5 exposure, as well as (iii) redistributive and environmental preferences.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
1. Perceived relative household income
2. Contribution to pro-environmental NGO
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
1. Stated support for public policies
2. Stated adoption of defensive mechanisms
3. Perception of own health impact due to air pollution exposure
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
As our main focus, we aim to manipulate the perceived relative income to test for a relationship between perceived relative income and revealed preferences for environmental quality.
Experimental Design Details
Randomization Method
Participants are randomly assigned to one of four treatment groups following a Latin square design.
Randomization Unit
Individual participant
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
Sample size: planned number of observations
2500 individuals
Sample size (or number of clusters) by treatment arms
approx. 650 individuals per treatment arm
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Ethics Committee of the University of Göttingen
IRB Approval Date
IRB Approval Number
Analysis Plan

Analysis Plan Documents


MD5: f4eb17959d98c66b6e2d836eec6c1236

SHA1: 35c0bb5fb9f3319adba51c916e999979f77d6ec0

Uploaded At: May 13, 2022

Amendment to the PAP for new data collection -- 23Sept2022

MD5: abb7b62de31971e9c6a605f71a37b975

SHA1: 49012f3e8d4a35a87fee8b331cb13ab48388a642

Uploaded At: September 23, 2022


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials