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No Conditional Cooperation? Trials in a large online Fundraising Campaign
Last registered on November 13, 2018

Pre-Trial

Trial Information
General Information
Title
No Conditional Cooperation? Trials in a large online Fundraising Campaign
RCT ID
AEARCTR-0003543
Initial registration date
November 08, 2018
Last updated
November 13, 2018 1:06 AM EST
Location(s)

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Primary Investigator
Affiliation
Other Primary Investigator(s)
PI Affiliation
Additional Trial Information
Status
In development
Start date
2018-11-09
End date
2020-03-31
Secondary IDs
Abstract
This experimental study tests the role of conditional cooperation for user's donations to a large online platform. Specifically, we vary the text used in solicitation banners in two randomized A/B tests. The treatment varies the communicated number of other users who donated in the past. In a second test we attempt to shed light on the persistence of conditional cooperation when relating the number of donations to the number of users of the online platform.
External Link(s)
Registration Citation
Citation
Linek, Maximilian and Christian Traxler. 2018. "No Conditional Cooperation? Trials in a large online Fundraising Campaign." AEA RCT Registry. November 13. https://doi.org/10.1257/rct.3543-1.0.
Former Citation
Linek, Maximilian, Maximilian Linek and Christian Traxler. 2018. "No Conditional Cooperation? Trials in a large online Fundraising Campaign." AEA RCT Registry. November 13. https://www.socialscienceregistry.org/trials/3543/history/37102.
Experimental Details
Interventions
Intervention(s)
This experimental study tests the role of conditional cooperation for user's donations to a large online platform.
Intervention Start Date
2018-11-09
Intervention End Date
2018-11-11
Primary Outcomes
Primary Outcomes (end points)
(1) number of donations, (2) number of donation page views (clicks on the solicitation link)
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
(3) the number of x-clicks
Secondary Outcomes (explanation)
the number a user closes the donation solicitation in her browser
Experimental Design
Experimental Design
Two A/B tests will be conducted, both of which will vary the text content of the solicitation to donate. First, we vary the communicated number of other users who donated in the past. Second, we attempt to shed light on the persistence of conditional cooperation when relating the number of donations to the number of users of the online platform.
Experimental Design Details
Not available
Randomization Method
Randomization done by cooperation partner
Randomization Unit
Browser sessions of users of the online platform
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
no cluster
Sample size: planned number of observations
1,200,000 browser sessions
Sample size (or number of clusters) by treatment arms
assignment to either treatment or control group is conducted randomly with equal probability (50%)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
IRB Approval Date
IRB Approval Number
Analysis Plan

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