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Narratives and Valuations (Field)

Last registered on December 01, 2022


Trial Information

General Information

Narratives and Valuations
Initial registration date
August 04, 2022

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 09, 2022, 2:33 PM EDT

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

Last updated
December 01, 2022, 9:06 AM EST

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


Primary Investigator

University of Pittsburgh

Other Primary Investigator(s)

PI Affiliation

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial is based on or builds upon one or more prior RCTs.
We manipulate the likelihood of narrative thinking in a randomized field experiment to estimate the effect of narrative (compared to analytical) thinking on valuations.
External Link(s)

Registration Citation

Morag, Dor and George Loewenstein. 2022. "Narratives and Valuations." AEA RCT Registry. December 01.
Experimental Details


Self-constructed stimuli - Participants are randomized to describe their pre-owned item differently or write an unrelated paragraph.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Willingness to Accept (WTA) in USD, and unwillingness to sell (refusing to sell at any offered price)
Primary Outcomes (explanation)
WTA is the switching price in the MPL

Secondary Outcomes

Secondary Outcomes (end points)
15 post-MPL questions
Secondary Outcomes (explanation)
After submitting their MPL choices, participants answer a set of questions regarding their item and their selling process.
Participants' self-constructed texts are used in a language analysis to study correlations with WTA.
If participants indicate that they knew they will be offered to sell their hat (on the question regarding why they chose this hat today), they are excluded.

Experimental Design

Experimental Design
People wearing a hat are approached on campus (not knowing why) and offered to participate in a short survey. Once consent is given, participants fill out a demographics questionnaire and are randomized to describe their items differently. Finally, participants are surprisingly offered to sell their items to the experimenter, and their willingness to accept (WTA) is elicited through incentivized multiple price lists (where one decision might be randomly selected to count). Finally, participants answer 15 questions regarding their hats.
Experimental Design Details
We manipulate the likelihood of narrative thinking by asking participants to describe their self-selected item with either a story (narrative thinking) or a list (analytical thinking). Thus, participants naturally create their stimuli like they would in real life. Note that when the description is written, participants don't know they'll be offered to sell it.
Randomization Method
Digital randomization for the treatment arms, and a public lottery for the binding decisions in the MPL.
Randomization Unit
The individual is the randomized unit for treatment, and the decision number (e.g., decision 20 regarding $10) is the randomized unit for the MPL lottery per participant.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
300 participants
Sample size: planned number of observations
300 participants
Sample size (or number of clusters) by treatment arms
100 narrative, 100 list, and 100 no description.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Human Judgment and Decision-Making
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials