“Uncertain Competition in the Ultimatum Game”

Last registered on October 05, 2021

Pre-Trial

Trial Information

General Information

Title
“Uncertain Competition in the Ultimatum Game”
RCT ID
AEARCTR-0008323
Initial registration date
October 02, 2021
Last updated
October 05, 2021, 2:10 PM EDT

Locations

Region

Primary Investigator

Affiliation
University of Wyoming

Other Primary Investigator(s)

PI Affiliation
University of Wyoming
PI Affiliation
University of Wyoming
PI Affiliation
University of Wyoming

Additional Trial Information

Status
On going
Start date
2021-09-13
End date
2021-10-30
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This study seeks to identify how uncertainty about competition shape labor market outcomes. This paper will use a variant of the ultimatum game that corresponds to posted-offer hiring to identify how uncertain competition alter labor market outcomes. Our ultimatum game will incorporate competition through multiple respondents for a single proposer and will incorporate uncertainty by hiding the true number of respondents from other respondents.
External Link(s)

Registration Citation

Citation
Cherry, Todd et al. 2021. "“Uncertain Competition in the Ultimatum Game”." AEA RCT Registry. October 05. https://doi.org/10.1257/rct.8323-1.0
Experimental Details

Interventions

Intervention(s)
We vary the structure of the ultamatum game to capture the effects of uncertainty and competition on outcomes.
Intervention Start Date
2021-09-20
Intervention End Date
2021-10-30

Primary Outcomes

Primary Outcomes (end points)
Ultimatum Game Split, Offer acceptance
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We will run treatment groups through Qualtrics. The first batch of subjects will be assigned the role of proposer and will be randomly assigned to one of three treatments: standard ultimatum game, competitive ultimatum game, and uncertain
competitive ultimatum game. Once proposers have been assigned to their treatment, they will then decide how to split $10. After making their offer, they will complete a demographic survey and then exit the survey.

The second batch of experiments will be assigned the role of respondent and will be randomly assigned to a treatment group. Respondents are then matched to an offer that was made by a proposer. They then decide to accept or reject the offer. After making this descision, they complete a demographic survey and exit the survey.

We will use a 3x1 design: standard ultimatum game, competitive ultimatum game, and uncertain
competitive ultimatum game. The standard ultimatum game and the competitive ultimatum game will
allow us to replicate Fischbacher et al. 2009. We observe the proposer’s offer and the responder’s
decision to accept or reject the offer. After the experiment is over, we can create a probability of
acceptance for each potential split.

Subjects within the standard ultimatum treatment will be told that they will play the ultimatum game with
one other partner. Subjects within the competitive ultimatum treatment will be told that there will be one
proposer and three respondents in each group. If more than one respondent accepts an offer in a round,
one randomly determined respondent will receive the entire payment. In the uncertain competitive
ultimatum treatment, subjects will be told that there will be a 50% chance that there will only be one
respondent and a 50% chance that there will be three respondents in the group.
Experimental Design Details
Randomization Method
Randomization done by computer
Randomization Unit
Individual randomization
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
600 total subjects (200 offers and 400 responses)
Sample size: planned number of observations
600 total subjects (200 offers and 400 responses)
Sample size (or number of clusters) by treatment arms
50 proposers control, 50 proposer competition, 50 proposers uncertain control, 50 proposers uncertain competition
50 respondents control, 150 respondents competition, 50 respondents uncertain control, 150 respondents uncertain competition
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
University of Wyoming Institutional Review Board
IRB Approval Date
2021-08-31
IRB Approval Number
#20210809LT03097

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
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