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Seeding for civic crowdfunding
Last registered on August 07, 2019

Pre-Trial

Trial Information
General Information
Title
Seeding for civic crowdfunding
RCT ID
AEARCTR-0004195
Initial registration date
August 06, 2019
Last updated
August 07, 2019 4:59 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
University of Massachusetts Amherst
Other Primary Investigator(s)
PI Affiliation
The Pennsylvania State University
Additional Trial Information
Status
In development
Start date
2019-05-10
End date
2020-06-30
Secondary IDs
Abstract
This trial will investigate how seed funding in crowdfunding campaigns influences subsequent donation behavior.
External Link(s)
Registration Citation
Citation
Brent, Daniel and Nathan Chan. 2019. "Seeding for civic crowdfunding." AEA RCT Registry. August 07. https://doi.org/10.1257/rct.4195-1.0.
Former Citation
Brent, Daniel, Nathan Chan and Nathan Chan. 2019. "Seeding for civic crowdfunding." AEA RCT Registry. August 07. http://www.socialscienceregistry.org/trials/4195/history/51381.
Sponsors & Partners

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Request Information
Experimental Details
Interventions
Intervention(s)
We will provide seed funds for randomly-selected campaigns on ioby.org, an online crowdfunding platform.
Intervention Start Date
2019-06-17
Intervention End Date
2020-03-31
Primary Outcomes
Primary Outcomes (end points)
We will examine 1) % of budget funded and 2) binary outcome of whether a project reaches its funding goal.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Number of donors
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We will provide seed funds for randomly-selected campaigns on ioby.org, an online crowdfunding platform. We will have two treatment groups for which we will vary the manner of seed funding. Comparing across treatments, we will examine how outcomes are affected by the nature of the seed funding. We will also compare to a control group to glean the effects of seed funding.
Experimental Design Details
We provide an initial seed donations of $100 to randomly selected civic crowdfunding campaigns. In one treatment, campaigns will receive a $100 seed donation from a single donor, while in another treatment, campaigns will $25 seed donations from four donors. Comparing across treatments, we will examine how outcomes are affected by the number of seed donors involved.
Randomization Method
Block randomization done in office by computer
Randomization Unit
We will randomize by crowdfunding campaign.
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
70 treated units; >100 untreated units.
Sample size: planned number of observations
70 treated observations.
Sample size (or number of clusters) by treatment arms
35 in treatment 1, 35 in treatment 2, and >100 in control.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
University of Massachusetts Amherst Institutional Review Board
IRB Approval Date
2019-05-09
IRB Approval Number
2019-5536
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