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Pledges and charitable giving
Last registered on May 14, 2021

Pre-Trial

Trial Information
General Information
Title
Pledges and charitable giving
RCT ID
AEARCTR-0007673
Initial registration date
May 12, 2021
Last updated
May 14, 2021 9:40 AM EDT
Location(s)

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Primary Investigator
Affiliation
Texas A&M University
Other Primary Investigator(s)
PI Affiliation
Texas A&M University
Additional Trial Information
Status
In development
Start date
2021-05-19
End date
2025-05-19
Secondary IDs
Abstract
The study examines the effects of reminders on following though on a donation pledge and continued donation. We partner with a charity to conduct a field experiment to test the effects of reminders on donation rates and donation amounts in the short and long run.
External Link(s)
Registration Citation
Citation
Castillo, Marco and Ragan Petrie. 2021. "Pledges and charitable giving." AEA RCT Registry. May 14. https://doi.org/10.1257/rct.7673-1.0.
Sponsors & Partners

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Experimental Details
Interventions
Intervention(s)
The study examines the effects of reminders to donors on following though on a donation pledge and continued donation.
Intervention Start Date
2021-05-19
Intervention End Date
2022-05-19
Primary Outcomes
Primary Outcomes (end points)
donation rate and amount
Primary Outcomes (explanation)
This data will be provided by our partner
Secondary Outcomes
Secondary Outcomes (end points)
Duration of donation relationship
Secondary Outcomes (explanation)
This data will be provided by our partner
Experimental Design
Experimental Design
Donors will be randomized into a control and treatment group to get a reminder to donate and the donation amount.
Experimental Design Details
Not available
Randomization Method
Randomization done on a computer
Randomization Unit
Randomization done at the level of the individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
800 individuals
Sample size: planned number of observations
800 individuals
Sample size (or number of clusters) by treatment arms
Experiment 1 - 200 control, 200 treatment. Experiment 2 - 200 control, 200 treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
For each experiment, with roughly 400 individuals, we are powered to detect an increase of 13 percentage points in the donation rate, from a baseline of 63%. (alpha of 0.05, power of 0.8).
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Texas A&M Institutional Review Board
IRB Approval Date
2021-05-12
IRB Approval Number
IRB2021-0545M
Analysis Plan

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