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How Different Expiration Date Labels Impact Consumer Behavior
Last registered on April 25, 2017

Pre-Trial

Trial Information
General Information
Title
How Different Expiration Date Labels Impact Consumer Behavior
RCT ID
AEARCTR-0002185
Initial registration date
April 25, 2017
Last updated
April 25, 2017 2:38 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
University of Delaware
Other Primary Investigator(s)
PI Affiliation
Cornell University
PI Affiliation
University of Delaware
Additional Trial Information
Status
In development
Start date
2017-04-28
End date
2017-04-30
Secondary IDs
Abstract
According to the Natural Resources Defense Council, millions of Americans are throwing out good food because they believe it’s not safe to eat after the date on the package. However, throwing food away after the labeled dates is mainly due to consumers’ misunderstanding, as these dates are not standardized and the labeled food products are usually safe to consume long past these dates. To help address this misunderstanding, some have advocated for standardizing expiration date labels. Three leading options for these labels are: “best if used by”, “use by”, and “expired on”. This research analyzes 1) how the addition of an expiration date label changes consumer preference functions with respect to different production dates of a food product; and 2) how consumers’ willingness to consume the same food product varies with different labeling language.
External Link(s)
Registration Citation
Citation
Kaiser, Harry, Tongzhe Li and Kent Messer. 2017. "How Different Expiration Date Labels Impact Consumer Behavior." AEA RCT Registry. April 25. https://doi.org/10.1257/rct.2185-2.0
Former Citation
Kaiser, Harry, Tongzhe Li and Kent Messer. 2017. "How Different Expiration Date Labels Impact Consumer Behavior." AEA RCT Registry. April 25. https://www.socialscienceregistry.org/trials/2185/history/16887
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2017-04-29
Intervention End Date
2017-04-30
Primary Outcomes
Primary Outcomes (end points)
consumer preference
Primary Outcomes (explanation)
consumers’ willingness to consume a product
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We offer otherwise homogeneous products that are four days after, one day after, right on, one day before, or six days before their “expiration.” All five products are presented to each participant as a within-subject design. Moreover, we introduce a between-subject design that differs by specific labeling language in order to test how different date labels influence consumer behavior. Other than the aforementioned labeling treatments, we have a fourth treatment that mimics how some developing countries label food products. In the fourth treatment, both production date and shelf life of the product are provided instead of the one “expiration” date. Moreover, we have a control group where no expiration date is provided, while the participants are only informed the production dates.
Experimental Design Details
Randomization Method
randomization by Python Willow
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
NA
Sample size: planned number of observations
260 individuals
Sample size (or number of clusters) by treatment arms
minimum of 52 in each treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
52 individual in each treatment
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
University of Delaware
IRB Approval Date
2017-02-14
IRB Approval Number
1026409-1
Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is data collection complete?
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports and Papers
Preliminary Reports
Relevant Papers