Respecting or Debiasing Investor Preferences? A Field Experiment on the Effectiveness of Portfolio Recommendations in Enhancing Investor Welfare

Last registered on December 15, 2023

Pre-Trial

Trial Information

General Information

Title
Respecting or Debiasing Investor Preferences? A Field Experiment on the Effectiveness of Portfolio Recommendations in Enhancing Investor Welfare
RCT ID
AEARCTR-0012219
Initial registration date
December 07, 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
December 15, 2023, 3:28 PM EST

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

Locations

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Primary Investigator

Affiliation
Peking University

Other Primary Investigator(s)

PI Affiliation
Peking University
PI Affiliation
Peking University
PI Affiliation
Peking University
PI Affiliation
Fudan University

Additional Trial Information

Status
In development
Start date
2023-12-01
End date
2024-06-01
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
The household finance literature has found that investors often deviate from optimal investment behavior and suffer wealth losses due to factors such as incomplete information, lack of financial knowledge, and behavioral biases. Investment advisors perform multiple functions including information provision, investor education, and asset allocation recommendations, serving as crucial means to assist investors. Currently, there are two popular logics for investment advisor’s asset allocation recommendations: catering to investor preferences and educating investor. Exploring which asset allocation logic and design are more comprehensive, trustworthy, and beneficial to investors’ welfare holds significant implications for the upgrade of advisory services, development of financial markets, and enhancement of social welfare.
The experiment will randomly divide users of a certain bank’s APP into four groups: control group, preference catering group, loss aversion education group, and mental accounting education group. The control group will be recommended a uniform non-personalized asset allocation. The preference catering group will be recommended an asset allocation that is algorithmically calculated to be optimal based on the investor’s behavioral parameters. The loss aversion education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the loss aversion parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged. The mental accounting education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the mental accounting parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged.
External Link(s)

Registration Citation

Citation
Jiang, Jiajun et al. 2023. "Respecting or Debiasing Investor Preferences? A Field Experiment on the Effectiveness of Portfolio Recommendations in Enhancing Investor Welfare." AEA RCT Registry. December 15. https://doi.org/10.1257/rct.12219-1.0
Experimental Details

Interventions

Intervention(s)
The experiment will randomly divide users of a certain bank’s APP into four groups: control group, preference catering group, loss aversion education group, and mental accounting education group. The control group will be recommended a uniform non-personalized asset allocation. The preference catering group will be recommended an asset allocation that is algorithmically calculated to be optimal based on the investor’s behavioral parameters. The loss aversion education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the loss aversion parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged. The mental accounting education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the mental accounting parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged.
Intervention Start Date
2023-12-01
Intervention End Date
2024-05-01

Primary Outcomes

Primary Outcomes (end points)
Browsing behavior, Asset reallocation behavior
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The experiment will randomly divide users of a certain bank’s APP into four groups: control group, preference catering group, loss aversion education group, and mental accounting education group. The control group will be recommended a uniform non-personalized asset allocation. The preference catering group will be recommended an asset allocation that is algorithmically calculated to be optimal based on the investor’s behavioral parameters. The loss aversion education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the loss aversion parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged. The mental accounting education group will be recommended an asset allocation that is algorithmically calculated to be optimal but with the modification of the mental accounting parameter to be fully rational while keeping the investor’s other behavioral parameters unchanged.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
about 2000000 individuals
Sample size: planned number of observations
about 2000000 individuals
Sample size (or number of clusters) by treatment arms
500000 individuals control group, 500000 individuals preference catering group, 500000 individuals loss aversion education group, 500000 individuals mental accounting education group
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Institutional Review Board, Guanghua School of Management, Peking University
IRB Approval Date
2023-10-06
IRB Approval Number
2023-27