Accommodation and Travel – A Stated-Preference Study

Last registered on June 23, 2023


Trial Information

General Information

Accommodation and Travel – A Stated-Preference Study
Initial registration date
June 15, 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
June 23, 2023, 4:45 PM EDT

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


Primary Investigator

Toulouse School of Economics

Other Primary Investigator(s)

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
The main objective of the survey is to elicited preferences for policies that will reduce noise levels from traffic and improve air quality with a positive effect on people’s health. A minor objective is to elicit preferences for travel time and traffic safety using the same survey format. Discrete choice experiments (DCE) using hypothetical scenario will be used for the elicitation of preferences. Hence, it is a stated-preference survey where no real decisions are made. To complement the DCE, questions about respondents’ living situations, for instance if he/she is living close to major roads, etc., and travel habits will be asked. The findings from the survey have the potential to be used for policy purposes, like cost-benefit analyses of transport investments.
External Link(s)

Registration Citation

Andersson, Henrik. 2023. "Accommodation and Travel – A Stated-Preference Study." AEA RCT Registry. June 23.
Experimental Details


A survey company will recruit respondents from an existing web panel. The data will then be delivered to the project group anonymized. Hence, the project group will never interact with any of the respondents, or know their identities. Respondents will decide where to complete the survey (in their home, on the bus, etc.).

It is voluntary to participate, and respondents will at the start of the survey be informed about the purpose of it, how data will be stored, and that they can whenever they want to leave the survey. They will also be informed that they will be anonymous, in the sense that it will not be possible to identify them through their answers, including the project group that will not know who they are.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
The main objectives are to: (1) examine how the introduction of congestion charges in Gothenburg, Sweden, perceived and how they may have influenced people's decisions on where to live (within or outside of the cordon congestion zone), and to (2) estimate monetary values for reducing fatality risk (the value of a statistical life), the value of time, and the value of quiet.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Respondents will be recruited from an existing web panel, hence individuals who have already agreed to be contacted for and to take part in surveys. Respondents must be at least 18 years old (legal age in Sweden) and not more than 85 years old to participate in our survey.

Respondents will then take part in a discrete choice experiment, that is a stated preference survey. In addition to questions about how the live and travel, they will also face two hypothetical choice situations; one asking respondents to choose between different alternatives that differ regarding level or air pollution, level of noise, and the cost of living, and another asking respondent which route they would choose where routes differ regarding travel time, accident risk, and cost of taking the route.

To summarize, the design is a classic discrete choice experiment where choices are hypothetical.
Experimental Design Details
Randomization Method
The survey company will randomly allocate those from the web panel who agrees to taking part in they survey to different treatments. this is done by the recruitment/survey platform so the randomization is done by a computer.
Randomization Unit
Not relevant.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
Sample size: planned number of observations
2200 respondents
Sample size (or number of clusters) by treatment arms
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

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Institutional Review Boards (IRBs)

IRB Name
TSE Research Ethics Committee for Experimental Research
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