Affective Polarization during Electoral Times

Last registered on August 29, 2022

Pre-Trial

Trial Information

General Information

Title
Affective Polarization during Electoral Times
RCT ID
AEARCTR-0009982
Initial registration date
August 26, 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
August 29, 2022, 2:19 PM EDT

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

Locations

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Primary Investigator

Affiliation
São Paulo School of Economics Fundação Getulio Vargas

Other Primary Investigator(s)

PI Affiliation
São Paulo School of Economics Fundação Getulio Vargas
PI Affiliation
McGill University

Additional Trial Information

Status
On going
Start date
2022-07-12
End date
2023-02-28
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We study the interplay between political and affective congruence in the formation of social ties on Twitter, in the context of the Brazilian 2022 elections.
External Link(s)

Registration Citation

Citation
Ajzenman, Nicolás, Bruno Ferman and Pedro Sant'Anna. 2022. "Affective Polarization during Electoral Times." AEA RCT Registry. August 29. https://doi.org/10.1257/rct.9982-1.0
Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2022-07-12
Intervention End Date
2022-12-22

Primary Outcomes

Primary Outcomes (end points)
See pre-analysis plan.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
See pre-analysis plan.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
Individual (Twitter user)
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
352 accounts
Sample size: planned number of observations
35,000 subjects (5,000 individuals who may be treated more than once in different treatment waves)
Sample size (or number of clusters) by treatment arms
4,400 subjects
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethical Compliance Committee on Research Involving Human Beings of Fundaçao Getulio Vargas
IRB Approval Date
2022-06-29
IRB Approval Number
Opinion n. 208/2022
Analysis Plan

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