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Short-term discounting in real-effort task
Last registered on July 04, 2017

Pre-Trial

Trial Information
General Information
Title
Short-term discounting in real-effort task
RCT ID
AEARCTR-0001061
Initial registration date
February 16, 2016
Last updated
July 04, 2017 2:35 PM EDT
Location(s)
Primary Investigator
Affiliation
UC Berkeley, Haas School of Business
Other Primary Investigator(s)
Additional Trial Information
Status
Completed
Start date
2016-02-20
End date
2016-03-17
Secondary IDs
Abstract
The goal of this study is to estimate the shape of short-term time preferences using incentive-compatible decisions over a real-effort task.
External Link(s)
Registration Citation
Citation
Augenblick, Ned. 2017. "Short-term discounting in real-effort task." AEA RCT Registry. July 04. https://doi.org/10.1257/rct.1061-5.0.
Former Citation
Augenblick, Ned. 2017. "Short-term discounting in real-effort task." AEA RCT Registry. July 04. http://www.socialscienceregistry.org/trials/1061/history/19162.
Experimental Details
Interventions
Intervention(s)
The goal of this study is to estimate the shape of short-term time preferences using incentive-compatible decisions over a real-effort task. The study is better defined as an experiment rather than a intervention as all experimental participants face (broadly) the same environment and make (broadly) the same decisions.
Intervention Start Date
2016-02-20
Intervention End Date
2016-03-17
Primary Outcomes
Primary Outcomes (end points)
The main data of the study is fairly simple - each decision represents the number of tasks chosen by a specific participant at a given time for a given wage for work that occurs for a given time window.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
The goal of this study is to estimate the shape of short-term time preferences using incentive-compatible decisions over a real-effort task.
Experimental Design Details
The goal of this study is to estimate the shape of short-term time preferences using incentive-compatible decisions over a real-effort task. The basic idea of the study is fairly simple: after practicing the task in the first week, study participants are asked the number of tasks they wish to complete for different wages on a given date as that date approaches over the next three weeks. For example, a participant might be asked questions (via text message) on Monday morning, Wednesday afternoon, and Thursday afternoon about work preferences for that Friday afternoon. Broadly, the study design and analysis plan largely follows that of Augenblick and Rabin (2016), using the same task and potential wages. The main differences are that there is that the choices are all within one week in order to determine a more precise shape for short-term time preferences and there is no focus on sophistication or projection bias. The main data of the study is fairly simple - each decision represents the number of tasks chosen by a specific participant at a given time for a given wage for work that occurs for a given time window.
Randomization Method
Computer
Randomization Unit
As discussed above, the study is better defined as an experiment in which all participants face (broadly) the same environment. The results will be clustered at the participant-level.
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
~100 participants
Sample size: planned number of observations
~20-25 observations of 5 wage decisions for each participant
Sample size (or number of clusters) by treatment arms
Each participant faces (broadly) the same environment
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 (CPHS)
IRB Approval Date
2014-04-02
IRB Approval Number
2011-07-3452
Analysis Plan
Analysis Plan Documents
PreregistrationAnalysisPlan.pdf

MD5: bc97879463ded239173528b2cd45db17

SHA1: cb87382763eb25459c72f1a8c33b295a9d0307c6

Uploaded At: February 16, 2016

PreregistrationAnalysisPlan2_oneAddedNote.pdf

MD5: fbf3ab53920909ed938e4d02188ed87d

SHA1: 288764d8a173ec783ca148b0cc7b142d9fd01e9c

Uploaded At: February 19, 2016

Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
Yes
Intervention Completion Date
March 01, 2016, 12:00 AM +00:00
Is data collection complete?
Yes
Data Collection Completion Date
March 01, 2016, 12:00 AM +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
99
Was attrition correlated with treatment status?
No
Final Sample Size: Total Number of Observations
99
Final Sample Size (or Number of Clusters) by Treatment Arms
99
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports, Papers & Other Materials
Relevant Paper(s)
REPORTS & OTHER MATERIALS