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Media Bias and the Demand for News
Last registered on February 13, 2019

Pre-Trial

Trial Information
General Information
Title
Media Bias and the Demand for News
RCT ID
AEARCTR-0003855
Initial registration date
February 05, 2019
Last updated
February 13, 2019 10:21 AM EST
Location(s)
Region
Primary Investigator
Affiliation
University of Oxford
Other Primary Investigator(s)
PI Affiliation
NHH Norwegian School of Economics
PI Affiliation
University of Bonn
Additional Trial Information
Status
Completed
Start date
2019-02-04
End date
2019-02-13
Secondary IDs
Abstract
See pdf.
External Link(s)
Registration Citation
Citation
Chopra, Felix, Ingar Haaland and Christopher Roth. 2019. "Media Bias and the Demand for News." AEA RCT Registry. February 13. https://doi.org/10.1257/rct.3855-2.0.
Former Citation
Chopra, Felix et al. 2019. "Media Bias and the Demand for News." AEA RCT Registry. February 13. https://www.socialscienceregistry.org/trials/3855/history/41487.
Experimental Details
Interventions
Intervention(s)
See pdf.
Intervention Start Date
2019-02-04
Intervention End Date
2019-02-12
Primary Outcomes
Primary Outcomes (end points)
See pdf.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
See pdf.
Experimental Design Details
Randomization Method
Randomization by computer.
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
3000 individuals
Sample size: planned number of observations
3000 individuals
Sample size (or number of clusters) by treatment arms
1500 treatment group: information treatment
1500 control group: no information treatment

2250 respondents receive the main outcome question (see pdf)
750 respondents do not receive the main outcome question, but instead receive a series of posterior beliefs (see pdf)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
NHH Norwegian School of Economics Institutional Review Board (NHH IRB)
IRB Approval Date
2019-02-05
IRB Approval Number
N/A
Analysis Plan

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Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is data collection complete?
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports and Papers
Preliminary Reports
Relevant Papers