Migration during wartime

Last registered on September 20, 2023


Trial Information

General Information

Migration during wartime
Initial registration date
September 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
September 20, 2023, 10:48 AM EDT

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


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Primary Investigator

University of Manchester

Other Primary Investigator(s)

PI Affiliation
University of Oxford

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
This study embeds a list experiment design in a survey of Ukraine’s population to study the proportion of people who would be willing to move abroad.
External Link(s)

Registration Citation

Doyle, David and Olga Onuch. 2023. "Migration during wartime ." AEA RCT Registry. September 20. https://doi.org/10.1257/rct.12129-1.0
Experimental Details


This study includes a survey-embedded list experiment.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
The outcome variable is a count, the number of statements with which a given respondent says they agree.
Primary Outcomes (explanation)
The difference between the average control group count and a treatment/placebo group count will yield an estimate of the prevalence of privately held agreement with the fourth statement in each treatment arm of the survey. This can be compared to the estimate generated by the direct questions on the same topics to generate an estimate of the extent of preference falsification.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
This study utilizes phone interviews with a randomly selected group of people from Ukraine's population. The survey agency KIIS generates random cell phone numbers using a computer. KIIS then contacts the chosen phone numbers, and if an adult answers, invites them to participate in the interview. If the number is invalid or the person who answers is unable to participate, the interviewer moves on to the next number.

Participants will be randomly allocated into three groups. One of those groups constitutes the control group; the other is the treated group with the controversial fourth statement; and the third group will receive the fourth placebo statement.
Experimental Design Details
Not available
Randomization Method
Respondents are assigned randomly to one of the four arms. Randomization of treatment assignments is accomplished by KIIS using their standard randomization software.
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
Sample size: planned number of observations
2,000 respondents, all adult residents of Ukraine.
Sample size (or number of clusters) by treatment arms
Approximately 660 respondents per treatment arm.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
University of Manchester Research Ethics Committee 4
IRB Approval Date
IRB Approval Number
Analysis Plan

There is information in this trial unavailable to the public. Use the button below to request access.

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