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We are happy to announce that all trial registrations will now be issued DOIs (digital object identifiers). For more information, see here.
Study Supporters
Last registered on August 27, 2014

Pre-Trial

Trial Information
General Information
Title
Study Supporters
RCT ID
AEARCTR-0000494
Initial registration date
August 27, 2014
Last updated
August 27, 2014 4:19 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
Harvard Kennedy School
Other Primary Investigator(s)
Additional Trial Information
Status
Completed
Start date
2014-03-01
End date
2014-08-01
Secondary IDs
Abstract
Students at an online university were asked to name a friend or family member with whom they communicated regularly and with whom they do not live. These "Study Supporters" were the texted and/or emailed each week with information about the class and asking them to encourage the students. Outcomes were course completion, grades, and re-enrollment.
External Link(s)
Registration Citation
Citation
Rogers, Todd. 2014. "Study Supporters." AEA RCT Registry. August 27. https://doi.org/10.1257/rct.494-1.0.
Former Citation
Rogers, Todd. 2014. "Study Supporters." AEA RCT Registry. August 27. https://www.socialscienceregistry.org/trials/494/history/2644.
Experimental Details
Interventions
Intervention(s)
Weekly text and emails to friends and family.
Intervention Start Date
2014-03-03
Intervention End Date
2014-07-30
Primary Outcomes
Primary Outcomes (end points)
Course completion, course grades, re-enrollment
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Randomized experiment with two conditions: treatment and control.
Experimental Design Details
Randomization Method
computer in office
Randomization Unit
individual level randomization
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
~1000 students with supporters, though it will vary based on whether students gave us text, email or both for their Study Supporters
Sample size: planned number of observations
~1000, though it will vary based on whether students gave us text, email or both for their Study Supporters
Sample size (or number of clusters) by treatment arms
~500, though it will vary based on whether students gave us text, email or both for their Study Supporters
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Harvard IRB
IRB Approval Date
2012-11-14
IRB Approval Number
23171
Analysis Plan
Analysis Plan Documents
preanalysis plan

MD5: e803cd8f9e1c190ef3b8dc67421c2336

SHA1: 05df3fa089ea5eab1d9ea59618c0c745150587b7

Uploaded At: August 27, 2014

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 and Papers
Preliminary Reports
Relevant Papers