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Anti-Bunching: A New Test for Signaling Motives in Prosocial Behavior

Last registered on January 19, 2020

Pre-Trial

Trial Information

General Information

Title
Anti-Bunching: A New Test for Signaling Motives in Prosocial Behavior
RCT ID
AEARCTR-0004809
Initial registration date
October 01, 2019

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
October 02, 2019, 11:14 AM EDT

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

Last updated
January 19, 2020, 12:26 PM EST

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

Locations

Region

Primary Investigator

Affiliation
University of Chicago

Other Primary Investigator(s)

Additional Trial Information

Status
Completed
Start date
2019-10-08
End date
2019-11-11
Secondary IDs
Abstract
Online experiment to study how signaling motives for prosocial behavior interact with incentives for bunching
External Link(s)

Registration Citation

Citation
Birke, David. 2020. "Anti-Bunching: A New Test for Signaling Motives in Prosocial Behavior." AEA RCT Registry. January 19. https://doi.org/10.1257/rct.4809-1.4
Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2019-10-08
Intervention End Date
2019-11-11

Primary Outcomes

Primary Outcomes (end points)
Number of tasks completed for charity, reported beliefs about what other subjects see as generous
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
See attached pre-analysis plan (registered before the trial, will be published when the trial is complete)
Experimental Design Details
Randomization Method
Randomization done by a computer
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
2,400 individuals
Sample size: planned number of observations
2,400 individuals
Sample size (or number of clusters) by treatment arms
See attached pre-analysis plan (registered before the trial, will be published when the trial is complete)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
UC Berkeley - Committee for Protection of Human Subjects
IRB Approval Date
2019-09-16
IRB Approval Number
2019-08-12490
Analysis Plan

Analysis Plan Documents

Addendum 2 to Pre-Analysis Plan

MD5: 123b67dabef8de2095f5bc61ac79c921

SHA1: 675da5483f1374cf5110c2460fac1635bb75221c

Uploaded At: October 18, 2019

Addendum to Pre-Analysis Plan

MD5: 3cca8ec3d7ce81a7f0781dabdcbb42a2

SHA1: 41d1ca6cb87ff25d6df44974f55e20c1c3995598

Uploaded At: October 08, 2019

Pre-Analysis Plan

MD5: eb831b48dbc68312b0ec0ad3431bf318

SHA1: d4e662c1576929722565081d00854f4170776d36

Uploaded At: October 01, 2019

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
Yes
Intervention Completion Date
October 20, 2019, 12:00 +00:00
Data Collection Complete
Yes
Data Collection Completion Date
October 20, 2019, 12:00 +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
2153
Was attrition correlated with treatment status?
No
Final Sample Size: Total Number of Observations
2153
Final Sample Size (or Number of Clusters) by Treatment Arms
349 "No badge and no bonus", 180 "No badge and 40c bonus", 377 "No badge and $1.20 bonus", 179 "No badge and 40c bonus and 80c gift", 366 "Badge and no bonus", 184 "Badge and 40c bonus", 345 "Badge and $1.20 bonus", 173 "Badge and 40c bonus and 80c gift"
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials