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Field Before After
Study Withdrawn No
Intervention Completion Date November 16, 2021
Data Collection Complete Yes
Final Sample Size: Number of Clusters (Unit of Randomization) 1066 subjects
Was attrition correlated with treatment status? No
Final Sample Size: Total Number of Observations 1066 subjects
Final Sample Size (or Number of Clusters) by Treatment Arms 176 full compliance, 167 top 3 choice, 289 random assign, 233 top 3 choice (no select), 201 assigned (no rank)
Is there a restricted access data set available on request? Yes
Restricted Data Contact [email protected]
Program Files No
Data Collection Completion Date November 16, 2021
Is data available for public use? No
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Field Before After
Paper Abstract Rational information acquisition theory predicts people select the information that is more informative, thus people's beliefs will be more persuaded by the information they select. We test the prediction in a critical real-world context---information about COVID-19 vaccines. We conduct an online experiment in Taiwan where the subjects select information about COVID-19 vaccines, and then the subjects update their beliefs about the vaccine effectiveness and preferences of vaccines. As our design distinguishes different stages of the rational acquisition framework, it allows us to diagnose the underlying mechanism of the theory. Our empirical findings demonstrate evidence that people's information acquisition generally coheres with the rational theory framework predictions, that is, people choose information when the information is more likely to alter their decisions. We show that our subjects' beliefs change more when they see the information they select. We also find evidence of change in vaccine choices after they receive the information they select, which further suggests that the subjects follow the rational information acquisition framework.
Paper Citation Lin, ChienHsun, Hans H. Tung. (2023) The self-selection of information and the belief update: An experiment on COVID-19 vaccine information. Working paper.
Paper URL
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