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Public views on vaccine pricing
Last registered on April 15, 2021


Trial Information
General Information
Public views on vaccine pricing
Initial registration date
April 14, 2021
Last updated
April 15, 2021 6:19 AM EDT

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Primary Investigator
Monash University
Other Primary Investigator(s)
PI Affiliation
Monash University
PI Affiliation
Monash University
Additional Trial Information
In development
Start date
End date
Secondary IDs
Global pricing of vaccines against infectious diseases is an important determinant of global public health outcomes as it affects the production and distribution of vaccines across countries. Pricing of vaccines remains a contentious issue because there is a dilemma: ensuring vaccines are affordable to poorer countries which have a relatively high burden of disease compared to richer countries, while also providing pharmaceutical firms with sufficient incentives for the research, development and innovation of vaccines. As a result, there have been calls for equity-based pricing, where prices are based on a country’s ability to pay. Using an online randomised controlled survey experiment, we will analyse the relative effects of providing different types of information on public support for equity-based pricing of vaccines.
External Link(s)
Registration Citation
Chan, Yee Wah Lisa, Birendra Rai and Liang Choon Wang. 2021. "Public views on vaccine pricing." AEA RCT Registry. April 15. https://doi.org/10.1257/rct.7522-1.0.
Experimental Details
Intervention Start Date
Intervention End Date
Primary Outcomes
Primary Outcomes (end points)
1) A binary variable that is equal to 1 if the participant chooses prices consistent with equity-based pricing, and 0 otherwise.

2) A binary variable that is equal to 1 if the participant responds "Yes" to the question "Should the firm make some overall profit from its pricing across different countries?", and 0 otherwise.

There are a number of different scenarios and stages. Therefore, outcome variables are defined at the scenario level and stage level.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
The study will involve a randomised controlled choice experiment where we will try to infer the extent of public support for equity-based pricing of vaccines across different countries. The experiment will involve multiple treatment arms. Each arm will contain several stages, but the main difference will be whether and what type of information is provided to participants before they make their pricing decisions.

Experimental Design Details
Not available
Randomization Method
Randomizer in Qualtrics with the option "evenly present elements".
Randomization Unit
Was the treatment clustered?
Experiment Characteristics
Sample size: planned number of clusters
720 individuals
Sample size: planned number of observations
1440 observations (720 individuals x 2 stages)
Sample size (or number of clusters) by treatment arms
90 individuals per treatment arm
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB Name
Monash University Human Research Ethics Committee
IRB Approval Date
IRB Approval Number
Analysis Plan

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