Best BDM Instructions

Last registered on August 16, 2023
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Pre-Trial

Trial Information

General Information

Title
Best BDM Instructions
RCT ID
AEARCTR-0011920
Initial registration date
August 13, 2023

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
August 16, 2023, 10:20 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

Country
United States of America
Region

Primary Investigator

Name
Seong-Gyu Park
Affiliation
Claremont Graduate University
Contact Primary Investigator

Other Primary Investigator(s)

Additional Trial Information

Status
Completed
Start date
2023-08-15
End date
2023-08-16
Keywords
Behavior, Lab
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
It is a methodological study aimed at determining the best practical way to write instructions in a survey using the BDM (Becker-DeGroot-Marschak) mechanism.
External Link(s)

Registration Citation

Citation
Park, Seong-Gyu. 2023. "Best BDM Instructions." AEA RCT Registry. August 16. https://doi.org/10.1257/rct.11920-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Three different formats of the BDM (Becker-DeGroot-Marschak) instructions will be used as an intervention.
Intervention Start Date
2023-08-15
Intervention End Date
2023-08-16

Primary Outcomes

Primary Outcomes (end points)
Primary outcome is the constructed variable, the endowment effect, the standard error of which will be used to assess the efficacy (suitability) of the instruction formats in eliciting the treatment effect as precisely as possible.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The study has a 2 × 4 design, resulting in a total of 8 treatment groups. These groups consist of two conditions: one where participants are endowed with a digital coffee card, and the other where participants are not endowed with the item but receive money to buy it. Subsequently, subjects in each group will be exposed to one of the three different formats of instructions about how the BDM mechanism works (or one in the Descriptive format without a practice round).
Experimental Design Details
Randomization Method
Each individual subject will be randomly assigned to one of the treatment groups, and this assignment will be carried out using the randomizing method embedded in the Qualtrics survey.
Randomization Unit
Each individual subject will be randomly assigned to one of the treatment groups.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
N/A
Sample size: planned number of observations
800
Sample size (or number of clusters) by treatment arms
100 individuals for each treatment arm
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

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IRB

Institutional Review Boards (IRBs)

IRB Name
Claremont Graduate University IRB
IRB Approval Date
2022-05-02
IRB Approval Number
4177
Analysis Plan

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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