Learning about mortgage features

Last registered on May 05, 2022


Trial Information

General Information

Learning about mortgage features
Initial registration date
May 05, 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
May 05, 2022, 10:05 AM EDT

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



Primary Investigator

University of Technology Sydney

Other Primary Investigator(s)

PI Affiliation
PI Affiliation
PI Affiliation
PI Affiliation
PI Affiliation

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Recent research shows that the presentation format of information affects consumer perception of the information. This study examines this phenomenon in the context of home loan choices by testing whether people’s perception of mortgage loan sizes is format-dependent.
External Link(s)

Registration Citation

Agnew, Julie et al. 2022. "Learning about mortgage features." AEA RCT Registry. May 05. https://doi.org/10.1257/rct.9342-1.0
Experimental Details


Four interventions are introduced in the experiment. More details will be available after the experiment is completed.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
More information about the outcomes will be available after the experiment is completed.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We conduct an online survey experiment with a sample of representative Australian households. More details will be available after the experiment is completed.
Experimental Design Details
We conduct an online survey experiment with a sample of representative Australian households (aged between 25 years and 65 years and earn over AUD $52,000/year) who now have mortgages, have taken mortgages in the past, or plan to take mortgages in the near future. We aim for a 50:50 gender split with “prefer not to say” randomly assigned between males and females for quota purposes.
Subjects will be presented with different vignettes (households) for which they have to choose a mortgage that minimizes the risk of the respective vignette’s financial distress in choice tasks. Subjects will have the opportunity to learn about the mortgages in a preceding learning task.
Randomization occurs in two layers: First, subjects are randomly assigned to one out of four different vignettes. The remaining three vignettes will feature in the mortgage task; all vignettes feature in the choice task. The order of presentation of the vignettes will be randomized. Second, subjects are randomly assigned to four treatment groups. These treatment groups differ in their learning tasks as per the discussion in the intervention section.
Randomization Method
Randomisation by computer by the survey panel company.
Randomization Unit
The unit of randomisation is individual. More details will be available in the experimental design after the experiment is completed.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
1,200 individuals
Sample size: planned number of observations
1,200 individuals
Sample size (or number of clusters) by treatment arms
Treatment Group 1: 300 individuals
Treatment Group 2: 300 individuals
Treatment Group 3: 300 individuals
Treatment Group 4: 300 individuals
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
University of Sydney Human Research Ethics Committee
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