Attitudes towards Blood Plasma Donation Policies across EU Countries

Last registered on January 22, 2025

Pre-Trial

Trial Information

General Information

Title
Attitudes towards Blood Plasma Donation Policies across EU Countries
RCT ID
AEARCTR-0015255
Initial registration date
January 22, 2025

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
January 22, 2025, 9:35 AM 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

Other Primary Investigator(s)

PI Affiliation
Stanford University

Additional Trial Information

Status
In development
Start date
2025-01-22
End date
2025-07-22
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
Each survey participant will answer a series of questions about their opinions on the ethics of blood plasma donation policies. Some survey participants will be given information about their country's law related to blood plasma donations. They will also answer some questions about experiences with blood (plasma) donation, attitudes towards immigration, standard demographics, and political attitudes. Surveys will be fielded with representative samples in Czechia, Germany, Hungary, Netherlands, Slovakia, and Spain in the respective languages.
External Link(s)

Registration Citation

Citation
Roth, Alvin and Stephanie Wang. 2025. "Attitudes towards Blood Plasma Donation Policies across EU Countries." AEA RCT Registry. January 22. https://doi.org/10.1257/rct.15255-1.0
Experimental Details

Interventions

Intervention(s)
Half of the participants will receive information on whether payment for blood plasma donation is currently legal or not in their country and the other half will not receive this information. Participants who do not receive this information will be asked to state their belief about the legality of payment for blood plasma donation.
Intervention Start Date
2025-01-22
Intervention End Date
2025-07-22

Primary Outcomes

Primary Outcomes (end points)
We will focus on judgments about ethics of payment for blood plasma donations and ways to address domestic shortage of blood plasma if one exists.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
We will look at whether judgments about ethics of payment and differences in those judgments after receiving information are correlated with demographics, political orientation, and experience with blood (plasma) donation.
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Half of the participants will receive information on whether payment for blood plasma donation is currently legal or not in their country and the other half will not receive this information. Participants who do not receive this information will be asked to state their belief about the legality of payment for blood plasma donation. All participants will be asked questions about ethics of payment for blood plasma donations and ways to address domestic shortage of blood plasma if one exists.
Experimental Design Details
Not available
Randomization Method
Randomization of survey link sent to participants
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
500 participants/country, 3000 in all
Sample size: planned number of observations
500 participants/country, 3000 in all
Sample size (or number of clusters) by treatment arms
250 participants/country, 1500 in all in No Information treatment; 250 participants/country, 1500 in all in Information treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Stanford University
IRB Approval Date
2024-11-20
IRB Approval Number
78153