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Paycheck commitment device
Last registered on March 18, 2014

Pre-Trial

Trial Information
General Information
Title
Paycheck commitment device
RCT ID
AEARCTR-0000319
Initial registration date
March 18, 2014
Last updated
March 18, 2014 5:30 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
Harvard Kennedy School
Other Primary Investigator(s)
PI Affiliation
UPenn
Additional Trial Information
Status
Completed
Start date
2014-02-07
End date
2014-02-15
Secondary IDs
Abstract
We are interested in two things. First, how interested are middle school students in commitment devices? Second, how effective are commitment devices for middle school students? Third, what features of commitment devices affect whether or not they are taken up?
External Link(s)
Registration Citation
Citation
Duckworth, Angela and Todd Rogers. 2014. "Paycheck commitment device." AEA RCT Registry. March 18. https://doi.org/10.1257/rct.319-1.0.
Former Citation
Duckworth, Angela and Todd Rogers. 2014. "Paycheck commitment device." AEA RCT Registry. March 18. https://www.socialscienceregistry.org/trials/319/history/1343.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2014-02-07
Intervention End Date
2014-02-15
Primary Outcomes
Primary Outcomes (end points)
Takeup of commitment device
Student paycheck score
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Students are randomly assigned to one of three conditions:
1. Control: Students complete a survey. On the final page, they are shown the value of their PAYCHECK from the previous week. They are asked:

Next week, do you want to set a goal to earn a paycheck of at least $«Paycheck Goal: 110% of last paycheck»
yes/no

2. Opt-in: Students complete a survey. On the final page, they are shown the value of their PAYCHECK from the previous week. They are asked:

Next week, do you want to set a goal to earn a paycheck of at least $«Paycheck Goal: 110% of last paycheck»
yes/no

They are then offered the opportunity to opt-in to a commitment device using language like the following:

Sometimes people find it helpful if there are consequences to not achieving their goals. We are offering you the chance to enroll in the following one-week trial:

You will earn a PAYCHECK next week of at least [110% OF LAST PAYCHECK], or 3 points will automatically be deducted from you PAYCHECK next week

Would you like to enroll in this one-week trial?
yes/no

3. Opt-out: Students complete a survey. On the final page, they are shown the value of their PAYCHECK from the previous week. They are asked:

Next week, do you want to set a goal to earn a paycheck of at least $«Paycheck Goal: 110% of last paycheck»
yes/no

They are then offered the opportunity to opt-out of a commitment device using language like the following:

Sometimes people find it helpful if there are consequences to not achieving their goals. You are automatically enrolled in the following.

You will earn a PAYCHECK next week of at least [110% OF LAST PAYCHECK], or 3 points will automatically be deducted from you PAYCHECK next week

Would you like to unenrolled (i.e., drop out) of this one-week trial?
yes/no
Experimental Design Details
Randomization Method
Randomization done in office by computer
Randomization Unit
Individual students
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
1
Sample size: planned number of observations
~300
Sample size (or number of clusters) by treatment arms
~100
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
2013-11-05
IRB Approval Number
IRB13-2091
Analysis Plan

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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