x

Please fill out this short user survey of only 3 questions in order to help us improve the site. We appreciate your feedback!
Magical thinking and time
Last registered on May 18, 2021

Pre-Trial

Trial Information
General Information
Title
Magical thinking and time
RCT ID
AEARCTR-0007549
Initial registration date
May 18, 2021
Last updated
May 18, 2021 9:43 AM EDT
Location(s)

This section is unavailable to the public. Use the button below to request access to this information.

Request Information
Primary Investigator
Affiliation
Stockholm School of Economics
Other Primary Investigator(s)
Additional Trial Information
Status
In development
Start date
2021-05-19
End date
2022-12-31
Secondary IDs
Abstract
This experiment investigates the role of magical thinking in binary dictator games. In a 2x2 treatment design, subjects are randomly allocated across two treatment dimensions: Certainty and Time. The Certainty dimensions varies whether subjects are matched in traditional giver-receiver pairs (Role Certainty) or whether they are matched into pairs in which both subjects make dictator decisions and it is randomly determined which decision is actually implemented (Role Uncertainty). The Time dimension varies whether the subject participates before or after his or her opponent (the second-mover receives no information about the first-mover's choices).
External Link(s)
Registration Citation
Citation
Semb, Joakim. 2021. "Magical thinking and time." AEA RCT Registry. May 18. https://doi.org/10.1257/rct.7549-1.0.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2021-05-19
Intervention End Date
2021-06-30
Primary Outcomes
Primary Outcomes (end points)
Individual giving.
Primary Outcomes (explanation)
Giving decisions in binary dictator games.
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
In a 2x2 treatment design, subjects are randomly allocated across two treatment dimensions: Certainty and Time. The Certainty dimensions varies whether subjects are matched in traditional giver-receiver pairs (Role Certainty) or whether they are matched into pairs in which both subjects make dictator decisions and it is randomly determined which decision is actually implemented (Role Uncertainty). The Time dimension varies whether the subject participates before or after his or her opponent (the second-mover receives no information about the first-mover's choices).

Participants (except receivers in RC conditions) then make 20 binary allocation decisions, choosing between two allocations between themselves and their matched partner.

The parameter of interest is the interaction between certainty and time: does role uncertainty increase giving less among second-movers?
Experimental Design Details
Not available
Randomization Method
Computer randomization
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
Approx. 1200 decision-making participants, plus approx. 600 receivers
Sample size: planned number of observations
Approx. 1200 decision-making participants, plus approx. 600 receivers. 20 decisions per decision-making participant.
Sample size (or number of clusters) by treatment arms
Approx. 300 decisionmakers in each of the four treatment cells.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
IRB Approval Date
IRB Approval Number
Analysis Plan

There are documents in this trial unavailable to the public. Use the button below to request access to this information.

Request Information