Willingness to Pay for Carbon Mitigation

Last registered on February 07, 2020

Pre-Trial

Trial Information

General Information

Title
Willingness to Pay for Carbon Mitigation
RCT ID
AEARCTR-0005375
Initial registration date
January 31, 2020
Last updated
February 07, 2020, 3:54 PM EST

Locations

Region

Primary Investigator

Affiliation
University of Muenster

Other Primary Investigator(s)

Additional Trial Information

Status
In development
Start date
2020-02-05
End date
2020-08-31
Secondary IDs
Abstract
Detailed information can be found in the pre-analysis plan.
External Link(s)

Registration Citation

Citation
Rodemeier, Matthias. 2020. "Willingness to Pay for Carbon Mitigation." AEA RCT Registry. February 07. https://doi.org/10.1257/rct.5375-1.0
Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2020-02-05
Intervention End Date
2020-03-06

Primary Outcomes

Primary Outcomes (end points)
- Probability to purchase at the shop. (extensive margin)
- Probability to buy the carbon offset conditional on purchasing at the shop. (intensive margin)
- Answers to two survey questions (on a 7-point Likert scale).
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
- Number of follow-up purchases.
- Number of beverage crates ordered.
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
See pre-analysis plan.
Experimental Design Details
Randomization Method
By computer.
Randomization Unit
The randomization unit is the HTTP-Cookie of the website visitor.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
The expected number of website visitors is unknown. The sample size for the analysis on the intensive margin depends on the treatment effects on the extensive margin. If the treatments do not affect the extensive margin, I expect to observe 300,000 transactions. For more details, see pre-analysis plan.
Sample size: planned number of observations
The expected number of website visitors is unknown. The sample size for the analysis on the intensive margin depends on the treatment effects on the extensive margin. If the treatments do not affect the extensive margin, I expect to observe 300,000 transactions. For more details, see pre-analysis plan.
Sample size (or number of clusters) by treatment arms
If the treatments do not affect the extensive margin, I expect to observe 30,000 transactions per treatment group for the main analysis on the intensive margin. For more details, see pre-analysis plan.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
See pre-analysis plan.
IRB

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number
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