Negative Narratives

Last registered on February 20, 2025
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Pre-Trial

Trial Information

General Information

Title
Negative Narratives
RCT ID
AEARCTR-0015328
Initial registration date
February 13, 2025

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
February 20, 2025, 5:18 AM EST

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

Locations

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Primary Investigator

Name
Andrea Martinangeli
Affiliation
Burgundy School of Business
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Other Primary Investigator(s)

PI Name
Gianmarco Daniele
PI Affiliation
Università di Milano
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PI Name
Federica Braccioli
PI Affiliation
University of Vienna
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Additional Trial Information

Status
In development
Start date
2025-02-14
End date
2025-04-30
Keywords
Crime, Violence, & Conflict
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We investigate the impact of information statistics and the accompanying narratives about state capacity building on individuals' perceptions and attitudes towards the institutions.
External Link(s)

Registration Citation

Citation
Braccioli, Federica, Gianmarco Daniele and Andrea Martinangeli. 2025. "Negative Narratives." AEA RCT Registry. February 20. https://doi.org/10.1257/rct.15328-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
See analysis plan
Intervention Start Date
2025-02-14
Intervention End Date
2025-04-30

Primary Outcomes

Primary Outcomes (end points)
Institutional trust
Primary Outcomes (explanation)
Institutional trust as measures by questions about how the individual trusts institutions

Secondary Outcomes

Secondary Outcomes (end points)
See analysis plan
Secondary Outcomes (explanation)
See analysis plan

Experimental Design

Experimental Design
We randomise information about state capacity using 5 different information treatments.
See attached pre-analysis document for full design information.
Experimental Design Details
Not available
Randomization Method
Computerised
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
None
Sample size: planned number of observations
Main study: 6000 individuals Follow-up study: The follow-up study assumes a re-contact response rate of 60% (3600 individuals)
Sample size (or number of clusters) by treatment arms
Main study: 1200
Follow-up: 720
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Main study: We detect a minimum effect MDE=0.11 standard deviations over pairwise experimental condition comparisons of standardised outcomes, at power p=0.8 and alpha=0.05. Follow-up: We detect an MDE=0.14 standard deviations over pairwise experimental condition comparisons of standardised outcomes, at power p=0.8 and alpha=0.05.
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
WU ETHICS BOARD
IRB Approval Date
2025-01-02
IRB Approval Number
WU-RP-2024-055
Analysis Plan

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