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NEW UPDATE: Completed trials may now upload and register supplementary documents (e.g. null results reports, populated pre-analysis plans, or post-trial results reports) in the Post Trial section under Reports, Papers, & Other Materials.
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
Last updated
January 19, 2020 12:26 PM EST
Location(s)
Region
Primary Investigator
Affiliation
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.4809-1.3.
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
Pre-Analysis Plan

MD5: eb831b48dbc68312b0ec0ad3431bf318

SHA1: d4e662c1576929722565081d00854f4170776d36

Uploaded At: October 01, 2019

Addendum to Pre-Analysis Plan

MD5: 3cca8ec3d7ce81a7f0781dabdcbb42a2

SHA1: 41d1ca6cb87ff25d6df44974f55e20c1c3995598

Uploaded At: October 08, 2019

Addendum 2 to Pre-Analysis Plan

MD5: 123b67dabef8de2095f5bc61ac79c921

SHA1: 675da5483f1374cf5110c2460fac1635bb75221c

Uploaded At: October 18, 2019

Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is 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