The Giving Jackpot: Investigating the impact of lottery matches in a field experiment

Last registered on December 05, 2025
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Pre-Trial

Trial Information

General Information

Title
The Giving Jackpot: Investigating the impact of lottery matches in a field experiment
RCT ID
AEARCTR-0014556
Initial registration date
November 23, 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
December 05, 2025, 9:28 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
Amelia Ahles
Affiliation
Oklahoma State University
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Other Primary Investigator(s)

Additional Trial Information

Status
In development
Start date
2025-12-02
End date
2026-12-02
Keywords
Behavior
Additional Keywords
charitable giving, matching, lotteries, donations
JEL code(s)
C90, D64, L31
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
tbd
External Link(s)

Registration Citation

Citation
Ahles, Amelia. 2025. "The Giving Jackpot: Investigating the impact of lottery matches in a field experiment." AEA RCT Registry. December 05. https://doi.org/10.1257/rct.14556-1.0
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2025-12-02
Intervention End Date
2026-12-02

Primary Outcomes

Primary Outcomes (end points)
Donation amounts
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
interaction with giving messages
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
A field experiment on charitable giving using a Giving Tuesday campaign
Experimental Design Details
Not available
Randomization Method
Randomization done by computer
Randomization Unit
individual randomization into treatments
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
not clustered
Sample size: planned number of observations
2,500 individuals
Sample size (or number of clusters) by treatment arms
1,250 per treatment with 2 treatments
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
medium effect size (d=0.5) with 80% power specifies 64 donors per treatment.
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Oklahoma State University
IRB Approval Date
2025-10-02
IRB Approval Number
IRB-25-449-OFF
Analysis Plan

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