Comparing a discrete choice experiment with a BDM mechanism in preference elicitation

Last registered on August 10, 2023
View Trial History

Pre-Trial

Trial Information

General Information

Title
Comparing a discrete choice experiment with a BDM mechanism in preference elicitation
RCT ID
AEARCTR-0011878
Initial registration date
August 02, 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 10, 2023, 12:55 PM EDT

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

Locations

Country
Greece
Region

Primary Investigator

Name
Andreas Drichoutis
Affiliation
Agricultural University of Athens
Contact Primary Investigator

Other Primary Investigator(s)

Additional Trial Information

Status
On going
Start date
2023-08-02
End date
2023-08-31
Keywords
Behavior
Additional Keywords
BDM mechanism, discrete choice, hypothetical study
JEL code(s)
C90, D12
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This study elicits consumers' WTP for microalgae-based food products. The elicitation format varies between subjects whether WTP is elicited via the BDM mechanism or Discrete choice (Yes/No) questions. No incentives are provided and subjects are aware that elicitation is hypothetical. We also vary between-subjects the type of food product (milk vs. beer).
External Link(s)

Registration Citation

Citation
Drichoutis, Andreas. 2023. "Comparing a discrete choice experiment with a BDM mechanism in preference elicitation." AEA RCT Registry. August 10. https://doi.org/10.1257/rct.11878-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
This study elicits consumers' WTP for microalgae-based food products. The elicitation format varies between subjects whether WTP is elicited via the BDM mechanism or Discrete choice (Yes/No) questions. No incentives are provided and subjects are aware that elicitation is hypothetical. We also vary between-subjects the type of food product (milk vs. beer).

Subjects will be recruited via a mix of methods. On the one hand, invitations will be sent to a sample of subjects from the general population that have participated in lab experiments in the past. In addition, the study will be advertised through social media accounts. The survey is administered online via Qualtrics.
Intervention Start Date
2023-08-02
Intervention End Date
2023-08-31

Primary Outcomes

Primary Outcomes (end points)
willingness to pay
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
This study elicits consumers' WTP for microalgae-based food products. The elicitation format varies between subjects whether WTP is elicited via the BDM mechanism or Discrete choice (Yes/No) questions. No incentives are provided and subjects are aware that elicitation is hypothetical. We also vary between-subjects the type of food product (milk vs. beer).
Experimental Design Details
Randomization Method
The software (Qualtrics) randomizes subjects to one of the between subjects treatments.
Randomization Unit
Individual.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
At least 200 subjects.
Sample size: planned number of observations
at least 200 observations
Sample size (or number of clusters) by treatment arms
at least 50 subjects per treatment.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Agricultural University of Athens
IRB Approval Date
2023-07-20
IRB Approval Number
60/20.07.2023
Analysis Plan

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