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Competing Now and Then
Last registered on May 11, 2020


Trial Information
General Information
Competing Now and Then
Initial registration date
January 20, 2020
Last updated
May 11, 2020 3:52 PM EDT
Primary Investigator
Wellesley College
Other Primary Investigator(s)
Additional Trial Information
Start date
End date
Secondary IDs
This project aims to investigate how having the option to delay entry into competition can affect the gender gap in the willingness to compete. If there is a gendered effect (women being more/less likely to compete when having the option to delay entry into competition), we would like to examine the mechanisms behind it, including gender differences in hyperbolic discounting, risk preferences, confidence, and the desire to prepare for the future task.
External Link(s)
Registration Citation
Shurchkov, Olga. 2020. "Competing Now and Then." AEA RCT Registry. May 11. https://doi.org/10.1257/rct.5284-2.0.
Experimental Details
The experiment will be conducted online on Amazon Mechanical Turk (AMT) and will follow the seminal Niederle and Vesterlund (2007) design, with modification to the task being a counting zeros task. The main interventions involve the opportunity to choose payment scheme and/or a delay in task completion, opportunity to view information relevant to the task prior to task completion for those who delay, and the opportunity to change payment schemes in the future.
Intervention Start Date
Intervention End Date
Primary Outcomes
Primary Outcomes (end points)
A binary indicator that the subject chose a tournament payment scheme; A binary indicator that the subject chose to delay performance; A binary indicator that the subject chose to switch to another payment scheme in the future; A ranking of all payment/delay schemes; A binary indicator whether a subject used the study information provided
Primary Outcomes (explanation)
See pre-analysis plan
Secondary Outcomes
Secondary Outcomes (end points)
Time spent on various decisions; Confidence in individual ability in the task under various payment schemes; Perception of gender stereotype associated with the task; explanation for choices from the post-experiment questionnaire
Measures of risk, competitiveness, and time preferences will be used for robustness checks, as specified in the pre-analysis plan.
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
The experiment consists of two main parts, where Part I takes place immediately as part of the original survey, while Part II takes place in the future, but may or may not take place for some subjects depending on treatment.
Part I begins with task performed under piece-rate payment scheme (round 1) and under tournament payment scheme (round 2). In round 3, subjects are randomly assigned to be in one of four treatments:
- Choice between piece-rate now and tournament now (Control)
- Choice between Piece Rate Later versus Tournament Later (Forced Delay); all subjects here further randomized into information and no information treatments
- Choice between Tournament Now versus Tournament Later (Forced Tournament); delaying subjects here further randomized into information and no information treatments
- Ranking between PR Now versus PR Later versus T Now versus T Later (Preference Ranking)
Experimental Design Details
Randomization Method
Randomization done via Qualtrics on a computer
Randomization Unit
Randomization at the individual level
Was the treatment clustered?
Experiment Characteristics
Sample size: planned number of clusters
1200 subjects
Sample size: planned number of observations
1200 subjects
Sample size (or number of clusters) by treatment arms
Control: 200
Forced Delay No Info: 200
Forced Delay Info: 200
Forced Tournament No Info: 200
Forced Tournament Info: 200
Preference Ranking: 200
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB Name
Wellesley College Institutional Review Board
IRB Approval Date
IRB Approval Number
N/A (Data collection approved and deemed exempt)
Post Trial Information
Study Withdrawal
Is the intervention completed?
Intervention Completion Date
April 30, 2020, 12:00 AM +00:00
Is data collection complete?
Data Collection Completion Date
April 30, 2020, 12:00 AM +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
Randomization at the individual level. 1206 observations collected.
Was attrition correlated with treatment status?
Final Sample Size: Total Number of Observations
1206 observations.
Final Sample Size (or Number of Clusters) by Treatment Arms
Piece-rate v. Tournament Now (Baseline) 202 Piece-rate v. Tournament Later (Forced Delay, No Tips) 190 Piece-rate v. Tournament Later (Forced Delay, Tips) 211 Tournament Now v. Tournament Later (Forced Tournament, No Tips) 209 Tournament Now v. Tournament Later (Forced Tournament, Tips) 202 Preference Ranking 192
Data Publication
Data Publication
Is public data available?
Program Files
Program Files
Reports, Papers & Other Materials
Relevant Paper(s)