Results Information and Donor Behavior

Last registered on February 25, 2019

Pre-Trial

Trial Information

General Information

Title
Results Information and Donor Behavior
RCT ID
AEARCTR-0003528
Initial registration date
November 20, 2018

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 04, 2018, 11:26 AM EST

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

Last updated
February 25, 2019, 1:14 PM EST

Last updated is the most recent time when changes to the trial's registration were published.

Locations

Region

Primary Investigator

Affiliation
Kellogg School of Management, Northwestern University

Other Primary Investigator(s)

PI Affiliation
Cargegie Mellon University
PI Affiliation
Kellogg School of Management, Northwestern University

Additional Trial Information

Status
On going
Start date
2018-11-01
End date
2019-04-15
Secondary IDs
Abstract
This study examines how the display of results and impact-related information affects donor behavior on a large charity rating website.
External Link(s)

Registration Citation

Citation
Coyne, Shannon, Sami Horn and Dean Karlan. 2019. "Results Information and Donor Behavior." AEA RCT Registry. February 25. https://doi.org/10.1257/rct.3528-2.0
Former Citation
Coyne, Shannon, Sami Horn and Dean Karlan. 2019. "Results Information and Donor Behavior." AEA RCT Registry. February 25. https://www.socialscienceregistry.org/trials/3528/history/42084
Experimental Details

Interventions

Intervention(s)
This study examines how the display of results and impact-related information affects donor behavior on a large charity rating website.
Intervention (Hidden)
This study examines how the display of results and impact-related information affects donor behavior on a large charity rating website (Charity Navigator). This study involves a collaboration between Northwestern University, Charity Navigator, and four additional charity rating organizations.
Intervention Start Date
2018-11-10
Intervention End Date
2019-04-15

Primary Outcomes

Primary Outcomes (end points)
The following outcome variables will be measured at the user level, using Charity Navigator's data analytics and web tracking tools:

1. Number of page views
2. Whether or not a user donates to charity (1/0)
3. Total donation amounts per user
4. Average donation amounts per user
5. Number of charities donated to
6. Proportion of total donations to charities with impact info
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
This study examines how the display of results and impact-related information affects donor behavior on a large charity rating website.
Experimental Design Details
Randomization Method
Online A/B test. Users visiting the Charity Navigator website will be randomized into one of two conditions.
Randomization Unit
User level
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
n/a
Sample size: planned number of observations
We estimate approximately 3,000,000 users based on the previous year’s traffic to Charity Navigator's website, however this may be higher or lower depending on the number of actual visitors during the date of intervention.
Sample size (or number of clusters) by treatment arms
We will include all users who access the website between the set dates. The sample is powered to detect differences in treatment effects.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Our intended sample size is approximately 3,000,000 users total. Based on power analyses, we estimate that this is adequate to detect a 1% change in page views, a 4% change in whether or not a user donates, and a 10% change in the average donation amount.
IRB

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials