Information Preferences and the Short and Long Run Effects of Information

Last registered on August 09, 2021

Pre-Trial

Trial Information

General Information

Title
Information Preferences and the Short and Long Run Effects of Information
RCT ID
AEARCTR-0005015
Initial registration date
November 10, 2019

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
November 12, 2019, 11:46 AM EST

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

Last updated
August 09, 2021, 7:45 AM EDT

Last updated is the most recent time when changes to the trial's registration were published.

Locations

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Primary Investigator

Affiliation
Universtiy of Innsbruck

Other Primary Investigator(s)

PI Affiliation
University of Mannheim

Additional Trial Information

Status
On going
Start date
2019-11-11
End date
2022-12-31
Secondary IDs
Abstract
In this project, we investigate how information on industrial livestock farming affects meat consumption in the short and long run. We estimate the demand for information and analyze how the effect of information varies with information preferences.
External Link(s)

Registration Citation

Citation
Epperson, Raphael and Andreas Gerster. 2021. "Information Preferences and the Short and Long Run Effects of Information ." AEA RCT Registry. August 09. https://doi.org/10.1257/rct.5015
Experimental Details

Interventions

Intervention(s)
Based on an encouragement design, individuals receive (or do not receive) information on industrial livestock farming.
Intervention Start Date
2019-11-11
Intervention End Date
2020-05-31

Primary Outcomes

Primary Outcomes (end points)
Short run:
Binary outcome of whether an individual chooses a voucher for a non-vegetarian (instead of a vegetarian) meal.

Long run:
Binary outcome of whether an individual eats meat when purchasing a meal in one of the canteens during the observed time period after the laboratory experiment. (The number of observations per individual depends on the number of purchases made.)

Primary Outcomes (explanation)
Long run:
We code a meal as containing meat based on the weekly food plans. In cases where our data is insufficient to determine exactly whether a meal contained meat (e.g. the salad bar), we code it as containing meat if meals in that category typically do.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Our research design builds on three central elements: (i) the elicitation of the willingness-to-pay (WTP) for information on industrial livestock farming, (ii) variation in the treatment of receiving this information, and (iii) the observation of the subjects’ meal choices (in particular their meat consumption) in the short and long run.We investigate short run effects based on a laboratory experiment. In addition, we can analyze long run effects due to supplementary field data.
Experimental Design Details
Not available
Randomization Method
Randomization is done via oTree
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
1,000 Individuals
Sample size: planned number of observations
1,000 Individuals
Sample size (or number of clusters) by treatment arms
Due to the encouragement design, the exact numbers are unclear. In our power calculations, we use the empirical WTP distribution from our pretest. See the attached pre-analysis plan for more details.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
See the attached pre-analysis plan.
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethics Committee at the University of Mannheim
IRB Approval Date
2019-10-15
IRB Approval Number
EK Mannheim 30/2019
Analysis Plan

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